style(lib): use just std instead of ::std in paths (#2101)

src/proto/h1/conn.rs

@@ -777,7 +777,7 @@ impl fmt::Debug for Writing {
     }
 }
 
-impl ::std::ops::BitAndAssign<bool> for KA {
+impl std::ops::BitAndAssign<bool> for KA {
     fn bitand_assign(&mut self, enabled: bool) {
         if !enabled {
             trace!("remote disabling keep-alive");
@@ -1041,7 +1041,7 @@ mod tests {
         conn.state.idle();
 
         match conn.poll() {
-            Err(ref err) if err.kind() == ::std::io::ErrorKind::UnexpectedEof => {},
+            Err(ref err) if err.kind() == std::io::ErrorKind::UnexpectedEof => {},
             other => panic!("unexpected frame: {:?}", other)
         }
     }
@@ -1065,7 +1065,7 @@ mod tests {
             conn.state.busy();
 
             match conn.poll() {
-                Err(ref err) if err.kind() == ::std::io::ErrorKind::UnexpectedEof => {},
+                Err(ref err) if err.kind() == std::io::ErrorKind::UnexpectedEof => {},
                 other => panic!("unexpected frame: {:?}", other)
             }
             Ok(())

src/proto/h1/decode.rs

@@ -386,7 +386,7 @@ mod tests {
 
     impl<'a> MemRead for &'a [u8] {
         fn read_mem(&mut self, _: &mut task::Context<'_>, len: usize) -> Poll<io::Result<Bytes>> {
-            let n = ::std::cmp::min(len, self.len());
+            let n = std::cmp::min(len, self.len());
             if n > 0 {
                 let (a, b) = self.split_at(n);
                 let buf = Bytes::copy_from_slice(a);

src/proto/h1/io.rs

@@ -278,7 +278,7 @@ where
 {
     fn read_mem(&mut self, cx: &mut task::Context<'_>, len: usize) -> Poll<io::Result<Bytes>> {
         if !self.read_buf.is_empty() {
-            let n = ::std::cmp::min(len, self.read_buf.len());
+            let n = std::cmp::min(len, self.read_buf.len());
             Poll::Ready(Ok(self.read_buf.split_to(n).freeze()))
         } else {
             let n = ready!(self.poll_read_from_io(cx))?;
@@ -773,7 +773,7 @@ mod tests {
         }
 
         let mut max = 8192;
-        while max < ::std::usize::MAX {
+        while max < std::usize::MAX {
             fuzz(max);
             max = (max / 2).saturating_mul(3);
         }

src/proto/mod.rs

@@ -50,7 +50,7 @@ mod body_length {
     #[derive(Clone, Copy, PartialEq, Eq)]
     pub(crate) struct DecodedLength(u64);
 
-    const MAX_LEN: u64 = ::std::u64::MAX - 2;
+    const MAX_LEN: u64 = std::u64::MAX - 2;
 
     impl DecodedLength {
         pub(crate) const CLOSE_DELIMITED: DecodedLength = DecodedLength(::std::u64::MAX);