fix(rustup): 1.0.0-nightly (e2fa53e59 2015-03-20)

* replace `char_at()` calls with itertor, as suggested by compiler
* fixed comparison in test

src/server/mod.rs

@@ -264,6 +264,6 @@ mod tests {
         ");
 
         handle_connection(&mut mock, &Reject);
-        assert_eq!(mock.write, b"HTTP/1.1 417 Expectation Failed\r\n\r\n");
+        assert_eq!(mock.write, &b"HTTP/1.1 417 Expectation Failed\r\n\r\n"[..]);
     }
 }