docs(lib): fix rustdoc warnings

src/header/common/accept.rs

@@ -12,7 +12,8 @@ header! {
     /// in-line image
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Accept = #( media-range [ accept-params ] )
     ///
     /// media-range    = ( "*/*"
@@ -40,6 +41,7 @@ header! {
     ///     ])
     /// );
     /// ```
+    ///
     /// ```
     /// use hyper::header::{Headers, Accept, qitem};
     /// use hyper::mime;

src/header/common/accept_charset.rs

@@ -12,7 +12,8 @@ header! {
     /// those charsets.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Accept-Charset = 1#( ( charset / "*" ) [ weight ] )
     /// ```
     ///

src/header/common/accept_encoding.rs

@@ -11,7 +11,8 @@ header! {
     /// preferred.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Accept-Encoding  = #( codings [ weight ] )
     /// codings          = content-coding / "identity" / "*"
     /// ```

src/header/common/accept_language.rs

@@ -10,7 +10,8 @@ header! {
     /// response.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Accept-Language = 1#( language-range [ weight ] )
     /// language-range  = <language-range, see [RFC4647], Section 2.1>
     /// ```
@@ -20,6 +21,7 @@ header! {
     /// * `en-us;q=1.0, en;q=0.5, fr`
     ///
     /// # Examples
+    ///
     /// ```
     /// use hyper::header::{Headers, AcceptLanguage, LanguageTag, qitem};
     ///
@@ -33,6 +35,7 @@ header! {
     ///     ])
     /// );
     /// ```
+    ///
     /// ```
     /// # extern crate hyper;
     /// # #[macro_use] extern crate language_tags;

src/header/common/accept_ranges.rs

@@ -9,7 +9,8 @@ header! {
     /// supports range requests for the target resource.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Accept-Ranges     = acceptable-ranges
     /// acceptable-ranges = 1#range-unit / \"none\"
     ///
@@ -26,12 +27,14 @@ header! {
     /// let mut headers = Headers::new();
     /// headers.set(AcceptRanges(vec![RangeUnit::Bytes]));
     /// ```
+    ///
     /// ```
     /// use hyper::header::{Headers, AcceptRanges, RangeUnit};
     ///
     /// let mut headers = Headers::new();
     /// headers.set(AcceptRanges(vec![RangeUnit::None]));
     /// ```
+    ///
     /// ```
     /// use hyper::header::{Headers, AcceptRanges, RangeUnit};
     ///
@@ -62,7 +65,8 @@ header! {
 /// representation's media type.
 ///
 /// # ABNF
-/// ```plain
+///
+/// ```text
 /// range-unit       = bytes-unit / other-range-unit
 /// bytes-unit       = "bytes"
 /// other-range-unit = token

src/header/common/access_control_allow_credentials.rs

@@ -13,7 +13,8 @@ use header::{Header, Raw};
 /// > match the following ABNF:
 ///
 /// # ABNF
-/// ```plain
+///
+/// ```text
 /// Access-Control-Allow-Credentials: "Access-Control-Allow-Credentials" ":" "true"
 /// ```
 ///
@@ -25,6 +26,7 @@ use header::{Header, Raw};
 /// * "true"
 ///
 /// # Examples
+///
 /// ```
 /// # extern crate hyper;
 /// # fn main() {

src/header/common/access_control_allow_headers.rs

@@ -9,7 +9,8 @@ header! {
     /// during the actual request.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Access-Control-Allow-Headers: "Access-Control-Allow-Headers" ":" #field-name
     /// ```
     ///
@@ -17,6 +18,7 @@ header! {
     /// * `accept-language, date`
     ///
     /// # Examples
+    ///
     /// ```
     /// # extern crate hyper;
     /// # extern crate unicase;
@@ -32,6 +34,7 @@ header! {
     /// );
     /// # }
     /// ```
+    ///
     /// ```
     /// # extern crate hyper;
     /// # extern crate unicase;

src/header/common/access_control_allow_methods.rs

@@ -9,7 +9,8 @@ header! {
     /// actual request.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Access-Control-Allow-Methods: "Access-Control-Allow-Methods" ":" #Method
     /// ```
     ///
@@ -17,6 +18,7 @@ header! {
     /// * `PUT, DELETE, XMODIFY`
     ///
     /// # Examples
+    ///
     /// ```
     /// use hyper::header::{Headers, AccessControlAllowMethods};
     /// use hyper::Method;
@@ -26,6 +28,7 @@ header! {
     ///     AccessControlAllowMethods(vec![Method::Get])
     /// );
     /// ```
+    ///
     /// ```
     /// use hyper::header::{Headers, AccessControlAllowMethods};
     /// use hyper::Method;

src/header/common/access_control_allow_origin.rs

@@ -8,10 +8,11 @@ use header::{Header, Raw};
 ///
 /// The `Access-Control-Allow-Origin` header indicates whether a resource
 /// can be shared based by returning the value of the Origin request header,
-/// "*", or "null" in the response.
+/// `*`, or `null` in the response.
 ///
 /// # ABNF
-/// ```plain
+///
+/// ```text
 /// Access-Control-Allow-Origin = "Access-Control-Allow-Origin" ":" origin-list-or-null | "*"
 /// ```
 ///

src/header/common/access_control_expose_headers.rs

@@ -8,7 +8,8 @@ header! {
     /// API of a CORS API specification.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Access-Control-Expose-Headers = "Access-Control-Expose-Headers" ":" #field-name
     /// ```
     ///
@@ -16,6 +17,7 @@ header! {
     /// * `ETag, Content-Length`
     ///
     /// # Examples
+    ///
     /// ```
     /// # extern crate hyper;
     /// # extern crate unicase;
@@ -34,6 +36,7 @@ header! {
     /// );
     /// # }
     /// ```
+    ///
     /// ```
     /// # extern crate hyper;
     /// # extern crate unicase;

src/header/common/access_control_max_age.rs

@@ -6,14 +6,17 @@ header! {
     /// preflight request can be cached in a preflight result cache.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Access-Control-Max-Age = \"Access-Control-Max-Age\" \":\" delta-seconds
     /// ```
     ///
     /// # Example values
+    ///
     /// * `531`
     ///
     /// # Examples
+    ///
     /// ```
     /// use hyper::header::{Headers, AccessControlMaxAge};
     ///

src/header/common/access_control_request_headers.rs

@@ -9,7 +9,8 @@ header! {
     /// during the actual request.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Access-Control-Allow-Headers: "Access-Control-Allow-Headers" ":" #field-name
     /// ```
     ///
@@ -17,6 +18,7 @@ header! {
     /// * `accept-language, date`
     ///
     /// # Examples
+    ///
     /// ```
     /// # extern crate hyper;
     /// # extern crate unicase;
@@ -32,6 +34,7 @@ header! {
     /// );
     /// # }
     /// ```
+    ///
     /// ```
     /// # extern crate hyper;
     /// # extern crate unicase;

src/header/common/access_control_request_method.rs

@@ -7,7 +7,8 @@ header! {
     /// The `Access-Control-Request-Method` header indicates which method will be
     /// used in the actual request as part of the preflight request.
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Access-Control-Request-Method: \"Access-Control-Request-Method\" \":\" Method
     /// ```
     /// 
@@ -15,6 +16,7 @@ header! {
     /// * `GET`
     /// 
     /// # Examples
+    ///
     /// ```
     /// use hyper::header::{Headers, AccessControlRequestMethod};
     /// use hyper::Method;

src/header/common/allow.rs

@@ -9,7 +9,8 @@ header! {
     /// with the resource.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Allow = #method
     /// ```
     ///
@@ -19,6 +20,7 @@ header! {
     /// * ``
     ///
     /// # Examples
+    ///
     /// ```
     /// use hyper::header::{Headers, Allow};
     /// use hyper::Method;
@@ -28,6 +30,7 @@ header! {
     ///     Allow(vec![Method::Get])
     /// );
     /// ```
+    ///
     /// ```
     /// use hyper::header::{Headers, Allow};
     /// use hyper::Method;

src/header/common/authorization.rs

@@ -14,7 +14,8 @@ use header::{Header, Raw};
 /// agent for the realm of the resource being requested.
 ///
 /// # ABNF
-/// ```plain
+///
+/// ```text
 /// Authorization = credentials
 /// ```
 ///
@@ -23,6 +24,7 @@ use header::{Header, Raw};
 /// * `Bearer fpKL54jvWmEGVoRdCNjG`
 ///
 /// # Examples
+///
 /// ```
 /// use hyper::header::{Headers, Authorization};
 ///
@@ -42,6 +44,7 @@ use header::{Header, Raw};
 ///    )
 /// );
 /// ```
+///
 /// ```
 /// use hyper::header::{Headers, Authorization, Bearer};
 ///

src/header/common/cache_control.rs

@@ -11,12 +11,14 @@ use header::parsing::{from_comma_delimited, fmt_comma_delimited};
 /// not imply that the same directive is to be given in the response.
 ///
 /// # ABNF
-/// ```plain
+///
+/// ```text
 /// Cache-Control   = 1#cache-directive
 /// cache-directive = token [ "=" ( token / quoted-string ) ]
 /// ```
 ///
 /// # Example values
+///
 /// * `no-cache`
 /// * `private, community="UCI"`
 /// * `max-age=30`
@@ -30,6 +32,7 @@ use header::parsing::{from_comma_delimited, fmt_comma_delimited};
 ///     CacheControl(vec![CacheDirective::MaxAge(86400u32)])
 /// );
 /// ```
+///
 /// ```
 /// use hyper::header::{Headers, CacheControl, CacheDirective};
 ///

src/header/common/connection.rs

@@ -59,7 +59,8 @@ header! {
     /// message.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Connection        = 1#connection-option
     /// connection-option = token
     ///
@@ -70,12 +71,14 @@ header! {
     /// ```
     ///
     /// # Examples
+    ///
     /// ```
     /// use hyper::header::{Headers, Connection};
     ///
     /// let mut headers = Headers::new();
     /// headers.set(Connection::keep_alive());
     /// ```
+    ///
     /// ```
     /// # extern crate hyper;
     /// # extern crate unicase;

src/header/common/content_disposition.rs

@@ -14,7 +14,7 @@ use header::{Header, Raw, parsing};
 use header::parsing::{parse_extended_value, http_percent_encode};
 use header::shared::Charset;
 
-/// The implied disposition of the content of the HTTP body
+/// The implied disposition of the content of the HTTP body.
 #[derive(Clone, Debug, PartialEq)]
 pub enum DispositionType {
     /// Inline implies default processing
@@ -26,7 +26,7 @@ pub enum DispositionType {
     Ext(String)
 }
 
-/// A parameter to the disposition type
+/// A parameter to the disposition type.
 #[derive(Clone, Debug, PartialEq)]
 pub enum DispositionParam {
     /// A Filename consisting of a Charset, an optional LanguageTag, and finally a sequence of
@@ -37,7 +37,7 @@ pub enum DispositionParam {
     Ext(String, String)
 }
 
-/// A `Content-Disposition` header, (re)defined in [RFC6266](https://tools.ietf.org/html/rfc6266)
+/// A `Content-Disposition` header, (re)defined in [RFC6266](https://tools.ietf.org/html/rfc6266).
 ///
 /// The Content-Disposition response header field is used to convey
 /// additional information about how to process the response payload, and
@@ -45,7 +45,8 @@ pub enum DispositionParam {
 /// to use when saving the response payload locally.
 ///
 /// # ABNF
-/// ```plain
+
+/// ```text
 /// content-disposition = "Content-Disposition" ":"
 ///                       disposition-type *( ";" disposition-parm )
 ///
@@ -66,6 +67,7 @@ pub enum DispositionParam {
 /// ```
 ///
 /// # Example
+///
 /// ```
 /// use hyper::header::{Headers, ContentDisposition, DispositionType, DispositionParam, Charset};
 ///

src/header/common/content_encoding.rs

@@ -13,20 +13,24 @@ header! {
     /// its underlying media type.
     /// 
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Content-Encoding = 1#content-coding
     /// ```
     /// 
     /// # Example values
+    ///
     /// * `gzip`
-    /// 
+    ///
     /// # Examples
+    ///
     /// ```
     /// use hyper::header::{Headers, ContentEncoding, Encoding};
     /// 
     /// let mut headers = Headers::new();
     /// headers.set(ContentEncoding(vec![Encoding::Chunked]));
     /// ```
+    ///
     /// ```
     /// use hyper::header::{Headers, ContentEncoding, Encoding};
     /// 

src/header/common/content_language.rs

@@ -11,15 +11,18 @@ header! {
     /// representation.
     /// 
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Content-Language = 1#language-tag
     /// ```
     /// 
     /// # Example values
+    ///
     /// * `da`
     /// * `mi, en`
-    /// 
+    ///
     /// # Examples
+    ///
     /// ```
     /// # extern crate hyper;
     /// # #[macro_use] extern crate language_tags;
@@ -34,6 +37,7 @@ header! {
     /// );
     /// # }
     /// ```
+    ///
     /// ```
     /// # extern crate hyper;
     /// # #[macro_use] extern crate language_tags;

src/header/common/content_length.rs

@@ -22,14 +22,17 @@ use header::{Header, Raw, parsing};
 /// > that contains a Transfer-Encoding header field.
 ///
 /// # ABNF
-/// ```plain
+///
+/// ```text
 /// Content-Length = 1*DIGIT
 /// ```
 ///
 /// # Example values
+///
 /// * `3495`
 ///
 /// # Example
+///
 /// ```
 /// use hyper::header::{Headers, ContentLength};
 ///

src/header/common/content_location.rs

@@ -11,11 +11,13 @@ header! {
     /// that was content negotiated, created or for the response payload.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Content-Location = absolute-URI / partial-URI
     /// ```
     ///
     /// # Example values
+    ///
     /// * `/hypertext/Overview.html`
     /// * `http://www.example.org/hypertext/Overview.html`
     ///
@@ -27,6 +29,7 @@ header! {
     /// let mut headers = Headers::new();
     /// headers.set(ContentLocation("/hypertext/Overview.html".to_owned()));
     /// ```
+    ///
     /// ```
     /// use hyper::header::{Headers, ContentLocation};
     ///

src/header/common/content_range.rs

@@ -70,7 +70,8 @@ header! {
 /// Content-Range, described in [RFC7233](https://tools.ietf.org/html/rfc7233#section-4.2)
 ///
 /// # ABNF
-/// ```plain
+///
+/// ```text
 /// Content-Range       = byte-content-range
 ///                     / other-content-range
 ///

src/header/common/content_type.rs

@@ -17,15 +17,18 @@ header! {
     /// this is an issue, it's possible to implement `Header` on a custom struct.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Content-Type = media-type
     /// ```
     ///
     /// # Example values
+    ///
     /// * `text/html; charset=utf-8`
     /// * `application/json`
     ///
     /// # Examples
+    ///
     /// ```
     /// use hyper::header::{Headers, ContentType};
     ///
@@ -35,6 +38,7 @@ header! {
     ///     ContentType::json()
     /// );
     /// ```
+    ///
     /// ```
     /// use hyper::header::{Headers, ContentType};
     /// use hyper::mime;

src/header/common/date.rs

@@ -7,14 +7,17 @@ header! {
     /// message was originated.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Date = HTTP-date
     /// ```
     ///
     /// # Example values
+    ///
     /// * `Tue, 15 Nov 1994 08:12:31 GMT`
     ///
     /// # Example
+    ///
     /// ```
     /// use hyper::header::{Headers, Date};
     /// use std::time::SystemTime;

src/header/common/etag.rs

@@ -14,16 +14,19 @@ header! {
     /// prefixed by a weakness indicator.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// ETag       = entity-tag
     /// ```
     ///
     /// # Example values
+    ///
     /// * `"xyzzy"`
     /// * `W/"xyzzy"`
     /// * `""`
     ///
     /// # Examples
+    ///
     /// ```
     /// use hyper::header::{Headers, ETag, EntityTag};
     ///

src/header/common/expires.rs

@@ -11,7 +11,8 @@ header! {
     /// time.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Expires = HTTP-date
     /// ```
     ///
@@ -19,6 +20,7 @@ header! {
     /// * `Thu, 01 Dec 1994 16:00:00 GMT`
     ///
     /// # Example
+    ///
     /// ```
     /// use hyper::header::{Headers, Expires};
     /// use std::time::{SystemTime, Duration};

src/header/common/from.rs

@@ -4,13 +4,16 @@ header! {
     /// The `From` header field contains an Internet email address for a
     /// human user who controls the requesting user agent.  The address ought
     /// to be machine-usable.
+    ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// From    = mailbox
     /// mailbox = <mailbox, see [RFC5322], Section 3.4>
     /// ```
     ///
     /// # Example
+    ///
     /// ```
     /// use hyper::header::{Headers, From};
     ///

src/header/common/if_match.rs

@@ -17,21 +17,25 @@ header! {
     /// there have been any changes to the representation data.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// If-Match = "*" / 1#entity-tag
     /// ```
     ///
     /// # Example values
+    ///
     /// * `"xyzzy"`
     /// * "xyzzy", "r2d2xxxx", "c3piozzzz"
     ///
     /// # Examples
+    ///
     /// ```
     /// use hyper::header::{Headers, IfMatch};
     ///
     /// let mut headers = Headers::new();
     /// headers.set(IfMatch::Any);
     /// ```
+    ///
     /// ```
     /// use hyper::header::{Headers, IfMatch, EntityTag};
     ///

src/header/common/if_modified_since.rs

@@ -11,7 +11,8 @@ header! {
     /// data has not changed.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// If-Unmodified-Since = HTTP-date
     /// ```
     ///
@@ -19,6 +20,7 @@ header! {
     /// * `Sat, 29 Oct 1994 19:43:31 GMT`
     ///
     /// # Example
+    ///
     /// ```
     /// use hyper::header::{Headers, IfModifiedSince};
     /// use std::time::{SystemTime, Duration};

src/header/common/if_none_match.rs

@@ -16,11 +16,13 @@ header! {
     /// the representation data.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// If-None-Match = "*" / 1#entity-tag
     /// ```
     ///
     /// # Example values
+    ///
     /// * `"xyzzy"`
     /// * `W/"xyzzy"`
     /// * `"xyzzy", "r2d2xxxx", "c3piozzzz"`
@@ -28,12 +30,14 @@ header! {
     /// * `*`
     ///
     /// # Examples
+    ///
     /// ```
     /// use hyper::header::{Headers, IfNoneMatch};
     ///
     /// let mut headers = Headers::new();
     /// headers.set(IfNoneMatch::Any);
     /// ```
+    ///
     /// ```
     /// use hyper::header::{Headers, IfNoneMatch, EntityTag};
     ///

src/header/common/if_range.rs

@@ -17,21 +17,25 @@ use header::{self, Header, Raw, EntityTag, HttpDate};
 /// in Range; otherwise, send me the entire representation.
 ///
 /// # ABNF
-/// ```plain
+///
+/// ```text
 /// If-Range = entity-tag / HTTP-date
 /// ```
 ///
 /// # Example values
+///
 /// * `Sat, 29 Oct 1994 19:43:31 GMT`
 /// * `\"xyzzy\"`
 ///
 /// # Examples
+///
 /// ```
 /// use hyper::header::{Headers, IfRange, EntityTag};
 ///
 /// let mut headers = Headers::new();
 /// headers.set(IfRange::EntityTag(EntityTag::new(false, "xyzzy".to_owned())));
 /// ```
+///
 /// ```
 /// use hyper::header::{Headers, IfRange};
 /// use std::time::{SystemTime, Duration};

src/header/common/if_unmodified_since.rs

@@ -11,14 +11,17 @@ header! {
     /// the user agent does not have an entity-tag for the representation.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// If-Unmodified-Since = HTTP-date
     /// ```
     ///
     /// # Example values
+    ///
     /// * `Sat, 29 Oct 1994 19:43:31 GMT`
     ///
     /// # Example
+    ///
     /// ```
     /// use hyper::header::{Headers, IfUnmodifiedSince};
     /// use std::time::{SystemTime, Duration};

src/header/common/last_modified.rs

@@ -10,14 +10,17 @@ header! {
     /// conclusion of handling the request.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Expires = HTTP-date
     /// ```
     ///
     /// # Example values
+    ///
     /// * `Sat, 29 Oct 1994 19:43:31 GMT`
     ///
     /// # Example
+    ///
     /// ```
     /// use hyper::header::{Headers, LastModified};
     /// use std::time::{SystemTime, Duration};

src/header/common/link.rs

@@ -14,7 +14,8 @@ use header::{Header, Raw};
 /// [RFC5988](http://tools.ietf.org/html/rfc5988#section-5)
 ///
 /// # ABNF
-/// ```plain
+///
+/// ```text
 /// Link           = "Link" ":" #link-value
 /// link-value     = "<" URI-Reference ">" *( ";" link-param )
 /// link-param     = ( ( "rel" "=" relation-types )
@@ -55,6 +56,7 @@ use header::{Header, Raw};
 ///        </TheBook/chapter4>; rel="next"; title*=UTF-8'de'n%c3%a4chstes%20Kapitel`
 ///
 /// # Examples
+///
 /// ```
 /// use hyper::header::{Headers, Link, LinkValue, RelationType};
 ///
@@ -108,7 +110,9 @@ pub struct LinkValue {
 }
 
 /// A Media Descriptors Enum based on:
-/// https://www.w3.org/TR/html401/types.html#h-6.13
+/// [https://www.w3.org/TR/html401/types.html#h-6.13][url]
+///
+/// [url]: https://www.w3.org/TR/html401/types.html#h-6.13
 #[derive(Clone, PartialEq, Debug)]
 pub enum MediaDesc {
     /// screen.

src/header/common/location.rs

@@ -8,7 +8,8 @@ header! {
     /// status code semantics.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Location = URI-reference
     /// ```
     ///
@@ -17,12 +18,14 @@ header! {
     /// * `http://www.example.net/index.html`
     ///
     /// # Examples
+    ///
     /// ```
     /// use hyper::header::{Headers, Location};
     ///
     /// let mut headers = Headers::new();
     /// headers.set(Location::new("/People.html#tim"));
     /// ```
+    ///
     /// ```
     /// use hyper::header::{Headers, Location};
     ///

src/header/common/origin.rs

@@ -9,11 +9,13 @@ use header::parsing::from_one_raw_str;
 /// The `Origin` header is a version of the `Referer` header that is used for all HTTP fetches and `POST`s whose CORS flag is set.
 /// This header is often used to inform recipients of the security context of where the request was initiated.
 ///
-///
-/// Following the spec, https://fetch.spec.whatwg.org/#origin-header, the value of this header is composed of
+/// Following the spec, [https://fetch.spec.whatwg.org/#origin-header][url], the value of this header is composed of
 /// a String (scheme), header::Host (host/port)
 ///
+/// [url]: https://fetch.spec.whatwg.org/#origin-header
+///
 /// # Examples
+///
 /// ```
 /// use hyper::header::{Headers, Origin};
 ///
@@ -22,6 +24,7 @@ use header::parsing::from_one_raw_str;
 ///     Origin::new("http", "hyper.rs", None)
 /// );
 /// ```
+///
 /// ```
 /// use hyper::header::{Headers, Origin};
 ///
@@ -30,7 +33,6 @@ use header::parsing::from_one_raw_str;
 ///     Origin::new("https", "wikipedia.org", Some(443))
 /// );
 /// ```
-
 #[derive(PartialEq, Clone, Debug)]
 pub struct Origin(OriginOrNull);
 
@@ -67,7 +69,8 @@ impl Origin {
         }
     }
 
-    /// The scheme, such as http or https
+    /// The scheme, such as http or https.
+    ///
     /// ```
     /// use hyper::header::Origin;
     /// let origin = Origin::new("https", "foo.com", Some(443));
@@ -80,7 +83,8 @@ impl Origin {
         }
     }
 
-    /// The host, such as Host{hostname: "hyper.rs".to_owned(), port: None}
+    /// The host, such as `Host { hostname: "hyper.rs".to_owned(), port: None}`.
+    ///
     /// ```
     /// use hyper::header::{Origin,Host};
     /// let origin = Origin::new("https", "foo.com", Some(443));

src/header/common/pragma.rs

@@ -15,15 +15,19 @@ use header::{Header, Raw, parsing};
 /// > implementation-specified directives for recipients.  This
 /// > specification deprecates such extensions to improve interoperability.
 ///
-/// Spec: https://tools.ietf.org/html/rfc7234#section-5.4
+/// Spec: [https://tools.ietf.org/html/rfc7234#section-5.4][url]
+///
+/// [url]: https://tools.ietf.org/html/rfc7234#section-5.4
 ///
 /// # Examples
+///
 /// ```
 /// use hyper::header::{Headers, Pragma};
 ///
 /// let mut headers = Headers::new();
 /// headers.set(Pragma::NoCache);
 /// ```
+///
 /// ```
 /// use hyper::header::{Headers, Pragma};
 ///

src/header/common/prefer.rs

@@ -9,7 +9,8 @@ use header::parsing::{from_comma_delimited, fmt_comma_delimited};
 /// behaviors be employed by a server while processing a request.
 ///
 /// # ABNF
-/// ```plain
+///
+/// ```text
 /// Prefer     = "Prefer" ":" 1#preference
 /// preference = token [ BWS "=" BWS word ]
 ///              *( OWS ";" [ OWS parameter ] )
@@ -22,6 +23,7 @@ use header::parsing::{from_comma_delimited, fmt_comma_delimited};
 /// * `wait=30`
 ///
 /// # Examples
+///
 /// ```
 /// use hyper::header::{Headers, Prefer, Preference};
 ///
@@ -30,6 +32,7 @@ use header::parsing::{from_comma_delimited, fmt_comma_delimited};
 ///     Prefer(vec![Preference::RespondAsync])
 /// );
 /// ```
+///
 /// ```
 /// use hyper::header::{Headers, Prefer, Preference};
 ///

src/header/common/preference_applied.rs

@@ -9,17 +9,20 @@ use header::parsing::{from_comma_delimited, fmt_comma_delimited};
 /// honored by the server and applied to the processing of a request.
 ///
 /// # ABNF
-/// ```plain
+///
+/// ```text
 /// Preference-Applied = "Preference-Applied" ":" 1#applied-pref
 /// applied-pref = token [ BWS "=" BWS word ]
 /// ```
 ///
 /// # Example values
+///
 /// * `respond-async`
 /// * `return=minimal`
 /// * `wait=30`
 ///
 /// # Examples
+///
 /// ```
 /// use hyper::header::{Headers, PreferenceApplied, Preference};
 ///
@@ -28,6 +31,7 @@ use header::parsing::{from_comma_delimited, fmt_comma_delimited};
 ///     PreferenceApplied(vec![Preference::RespondAsync])
 /// );
 /// ```
+///
 /// ```
 /// use hyper::header::{Headers, PreferenceApplied, Preference};
 ///

src/header/common/range.rs

@@ -12,7 +12,8 @@ use header::parsing::{from_one_raw_str};
 /// representation data.
 ///
 /// # ABNF
-/// ```plain
+///
+/// ```text
 /// Range =	byte-ranges-specifier / other-ranges-specifier
 /// other-ranges-specifier = other-range-unit "=" other-range-set
 /// other-range-set = 1*VCHAR
@@ -27,6 +28,7 @@ use header::parsing::{from_one_raw_str};
 /// ```
 ///
 /// # Example values
+///
 /// * `bytes=1000-`
 /// * `bytes=-2000`
 /// * `bytes=0-1,30-40`
@@ -35,6 +37,7 @@ use header::parsing::{from_one_raw_str};
 /// * `custom_unit=xxx-yyy`
 ///
 /// # Examples
+///
 /// ```
 /// use hyper::header::{Headers, Range, ByteRangeSpec};
 ///
@@ -46,6 +49,7 @@ use header::parsing::{from_one_raw_str};
 /// headers.clear();
 /// headers.set(Range::Unregistered("letters".to_owned(), "a-f".to_owned()));
 /// ```
+///
 /// ```
 /// use hyper::header::{Headers, Range};
 ///

src/header/common/referer.rs

@@ -9,20 +9,24 @@ header! {
     /// URI reference, if any, when generating the Referer field value.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Referer = absolute-URI / partial-URI
     /// ```
     ///
     /// # Example values
+    ///
     /// * `http://www.example.org/hypertext/Overview.html`
     ///
     /// # Examples
+    ///
     /// ```
     /// use hyper::header::{Headers, Referer};
     ///
     /// let mut headers = Headers::new();
     /// headers.set(Referer::new("/People.html#tim"));
     /// ```
+    ///
     /// ```
     /// use hyper::header::{Headers, Referer};
     ///

src/header/common/referrer_policy.rs

@@ -14,7 +14,8 @@ use header::{Header, Raw, parsing};
 /// protected resource.
 ///
 /// # ABNF
-/// ```plain
+///
+/// ```text
 /// Referrer-Policy: 1#policy-token
 /// policy-token   = "no-referrer" / "no-referrer-when-downgrade"
 ///                  / "same-origin" / "origin"
@@ -22,9 +23,11 @@ use header::{Header, Raw, parsing};
 /// ```
 ///
 /// # Example values
+///
 /// * `no-referrer`
 ///
 /// # Example
+///
 /// ```
 /// use hyper::header::{Headers, ReferrerPolicy};
 ///

src/header/common/server.rs

@@ -10,7 +10,8 @@ header! {
     /// responses.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Server = product *( RWS ( product / comment ) )
     /// ```
     ///
@@ -18,6 +19,7 @@ header! {
     /// * `CERN/3.0 libwww/2.17`
     ///
     /// # Example
+    ///
     /// ```
     /// use hyper::header::{Headers, Server};
     ///

src/header/common/set_cookie.rs

@@ -13,7 +13,8 @@ use std::str::from_utf8;
 /// a name-value-pair, followed by zero or more attribute-value pairs.
 ///
 /// # ABNF
-/// ```plain
+///
+/// ```text
 /// set-cookie-header = "Set-Cookie:" SP set-cookie-string
 /// set-cookie-string = cookie-pair *( ";" SP cookie-av )
 /// cookie-pair       = cookie-name "=" cookie-value
@@ -48,12 +49,14 @@ use std::str::from_utf8;
 /// ```
 ///
 /// # Example values
+///
 /// * `SID=31d4d96e407aad42`
 /// * `lang=en-US; Expires=Wed, 09 Jun 2021 10:18:14 GMT`
 /// * `lang=; Expires=Sun, 06 Nov 1994 08:49:37 GMT`
 /// * `lang=en-US; Path=/; Domain=example.com`
 ///
 /// # Example
+///
 /// ```
 /// use hyper::header::{Headers, SetCookie};
 ///

src/header/common/strict_transport_security.rs

@@ -17,7 +17,7 @@ use header::{Header, Raw, parsing};
 ///
 /// # ABNF
 ///
-/// ```plain
+/// ```text
 ///      [ directive ]  *( ";" [ directive ] )
 ///
 ///      directive                 = directive-name [ "=" directive-value ]
@@ -27,10 +27,12 @@ use header::{Header, Raw, parsing};
 /// ```
 ///
 /// # Example values
+///
 /// * `max-age=31536000`
 /// * `max-age=15768000 ; includeSubDomains`
 ///
 /// # Example
+///
 /// ```
 /// # extern crate hyper;
 /// # fn main() {

src/header/common/te.rs

@@ -13,7 +13,8 @@ header! {
     /// so should never appear in this header.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// TE        = "TE" ":" #( t-codings )
     /// t-codings = "trailers" | ( transfer-extension [ accept-params ] )
     /// ```
@@ -24,6 +25,7 @@ header! {
     /// * ``
     ///
     /// # Examples
+    ///
     /// ```
     /// use hyper::header::{Headers, Te, Encoding, qitem};
     ///
@@ -32,6 +34,7 @@ header! {
     ///     Te(vec![qitem(Encoding::Trailers)])
     /// );
     /// ```
+    ///
     /// ```
     /// use hyper::header::{Headers, Te, Encoding, qitem};
     ///
@@ -44,6 +47,7 @@ header! {
     ///     ])
     /// );
     /// ```
+    ///
     /// ```
     /// use hyper::header::{Headers, Te, Encoding, QualityItem, q, qitem};
     ///

src/header/common/transfer_encoding.rs

@@ -17,14 +17,17 @@ header! {
     /// > that contains a Transfer-Encoding header field.
     /// 
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Transfer-Encoding = 1#transfer-coding
     /// ```
     /// 
     /// # Example values
+    ///
     /// * `gzip, chunked`
     /// 
     /// # Example
+    ///
     /// ```
     /// use hyper::header::{Headers, TransferEncoding, Encoding};
     /// 

src/header/common/upgrade.rs

@@ -16,7 +16,8 @@ header! {
     /// change.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Upgrade          = 1#protocol
     ///
     /// protocol         = protocol-name ["/" protocol-version]
@@ -25,15 +26,18 @@ header! {
     /// ```
     ///
     /// # Example values
+    ///
     /// * `HTTP/2.0, SHTTP/1.3, IRC/6.9, RTA/x11`
     ///
     /// # Examples
+    ///
     /// ```
     /// use hyper::header::{Headers, Upgrade, Protocol, ProtocolName};
     ///
     /// let mut headers = Headers::new();
     /// headers.set(Upgrade(vec![Protocol::new(ProtocolName::WebSocket, None)]));
     /// ```
+    ///
     /// ```
     /// use hyper::header::{Headers, Upgrade, Protocol, ProtocolName};
     ///

src/header/common/user_agent.rs

@@ -11,20 +11,24 @@ header! {
     /// unless specifically configured not to do so.
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// User-Agent = product *( RWS ( product / comment ) )
     /// product         = token ["/" product-version]
     /// product-version = token
     /// ```
     ///
     /// # Example values
+    ///
     /// * `CERN-LineMode/2.15 libwww/2.17b3`
     /// * `Bunnies`
     ///
     /// # Notes
+    ///
     /// * The parser does not split the value
     ///
     /// # Example
+    ///
     /// ```
     /// use hyper::header::{Headers, UserAgent};
     ///

src/header/common/vary.rs

@@ -11,14 +11,17 @@ header! {
     /// (case-insensitive).
     ///
     /// # ABNF
-    /// ```plain
+    ///
+    /// ```text
     /// Vary = "*" / 1#field-name
     /// ```
     ///
     /// # Example values
+    ///
     /// * `accept-encoding, accept-language`
     ///
     /// # Example
+    ///
     /// ```
     /// use hyper::header::{Headers, Vary};
     ///
@@ -27,6 +30,7 @@ header! {
     /// ```
     ///
     /// # Example
+    ///
     /// ```
     /// # extern crate hyper;
     /// # extern crate unicase;

src/header/common/warning.rs

@@ -11,7 +11,8 @@ use header::parsing::from_one_raw_str;
 /// compatible way to notify of a deprecated API. 
 ///
 /// # ABNF
-/// ```plain
+///
+/// ```text
 /// Warning       = 1#warning-value
 /// warning-value = warn-code SP warn-agent SP warn-text
 ///                                       [ SP warn-date ]
@@ -25,12 +26,14 @@ use header::parsing::from_one_raw_str;
 /// ```
 ///
 /// # Example values
+///
 /// * `Warning: 112 - "network down" "Sat, 25 Aug 2012 23:34:45 GMT"`
 /// * `Warning: 299 - "Deprecated API " "Tue, 15 Nov 1994 08:12:31 GMT"`
 /// * `Warning: 299 api.hyper.rs:8080 "Deprecated API : use newapi.hyper.rs instead."`
 /// * `Warning: 299 api.hyper.rs:8080 "Deprecated API : use newapi.hyper.rs instead." "Tue, 15 Nov 1994 08:12:31 GMT"` 
 ///
 /// # Examples
+///
 /// ```
 /// use hyper::header::{Headers, Warning};
 ///
@@ -44,6 +47,7 @@ use header::parsing::from_one_raw_str;
 ///     }
 /// );
 /// ```
+///
 /// ```
 /// use hyper::header::{Headers, HttpDate, Warning};
 ///
@@ -57,6 +61,7 @@ use header::parsing::from_one_raw_str;
 ///     }
 /// );
 /// ```
+///
 /// ```
 /// use std::time::SystemTime;
 /// use hyper::header::{Headers, Warning};

src/header/parsing.rs

@@ -73,7 +73,8 @@ pub struct ExtendedValue {
 /// Extended values are denoted by parameter names that end with `*`.
 ///
 /// ## ABNF
-/// ```plain
+///
+/// ```text
 /// ext-value     = charset  "'" [ language ] "'" value-chars
 ///               ; like RFC 2231's <extended-initial-value>
 ///               ; (see [RFC2231], Section 7)
@@ -149,7 +150,9 @@ impl Display for ExtendedValue {
 }
 
 /// Percent encode a sequence of bytes with a character set defined in
-/// https://tools.ietf.org/html/rfc5987#section-3.2
+/// [https://tools.ietf.org/html/rfc5987#section-3.2][url]
+///
+/// [url]: https://tools.ietf.org/html/rfc5987#section-3.2
 pub fn http_percent_encode(f: &mut fmt::Formatter, bytes: &[u8]) -> fmt::Result {
     let encoded = percent_encoding::percent_encode(bytes, self::percent_encoding_http::HTTP_VALUE);
     fmt::Display::fmt(&encoded, f)

src/header/shared/charset.rs

@@ -9,7 +9,9 @@ use self::Charset::*;
 ///
 /// The string representation is normalised to upper case.
 ///
-/// See http://www.iana.org/assignments/character-sets/character-sets.xhtml
+/// See [http://www.iana.org/assignments/character-sets/character-sets.xhtml][url].
+///
+/// [url]: http://www.iana.org/assignments/character-sets/character-sets.xhtml
 #[derive(Clone,Debug,PartialEq)]
 #[allow(non_camel_case_types)]
 pub enum Charset{

src/header/shared/entity.rs

@@ -1,10 +1,10 @@
 use std::str::FromStr;
 use std::fmt::{self, Display};
 
-// check that each char in the slice is either:
-// 1. %x21, or
-// 2. in the range %x23 to %x7E, or
-// 3. above %x80
+/// check that each char in the slice is either:
+/// 1. `%x21`, or
+/// 2. in the range `%x23` to `%x7E`, or
+/// 3. above `%x80`
 fn check_slice_validity(slice: &str) -> bool {
     slice.bytes().all(|c|
         c == b'\x21' || (c >= b'\x23' && c <= b'\x7e') | (c >= b'\x80'))
@@ -17,7 +17,8 @@ fn check_slice_validity(slice: &str) -> bool {
 /// which always looks like `W/`. Examples for valid tags are `"xyzzy"` and `W/"xyzzy"`.
 ///
 /// # ABNF
-/// ```plain
+///
+/// ```text
 /// entity-tag = [ weak ] opaque-tag
 /// weak       = %x57.2F ; "W/", case-sensitive
 /// opaque-tag = DQUOTE *etagc DQUOTE