refactor(header): add #[inline] to new header constructors

Author: seanmonstar

src/header/common/connection.rs

@@ -73,11 +73,13 @@ header! {
 
 impl Connection {
     /// A constructor to easily create a `Connection: close` header.
+    #[inline]
     pub fn close() -> Connection {
         Connection(vec![ConnectionOption::Close])
     }
 
     /// A constructor to easily create a `Connection: keep-alive` header.
+    #[inline]
     pub fn keep_alive() -> Connection {
         Connection(vec![ConnectionOption::KeepAlive])
     }

src/header/common/content_type.rs

@@ -36,26 +36,31 @@ header! {
 
 impl ContentType {
     /// A constructor  to easily create a `Content-Type: application/json; charset=utf-8` header.
+    #[inline]
     pub fn json() -> ContentType {
         ContentType(mime!(Application/Json; Charset=Utf8))
     }
 
     /// A constructor  to easily create a `Content-Type: text/plain; charset=utf-8` header.
+    #[inline]
     pub fn plaintext() -> ContentType {
         ContentType(mime!(Text/Plain; Charset=Utf8))
     }
 
     /// A constructor  to easily create a `Content-Type: text/html; charset=utf-8` header.
+    #[inline]
     pub fn html() -> ContentType {
         ContentType(mime!(Text/Html; Charset=Utf8))
     }
 
     /// A constructor  to easily create a `Content-Type: image/jpeg` header.
+    #[inline]
     pub fn jpeg() -> ContentType {
         ContentType(mime!(Image/Jpeg))
     }
 
     /// A constructor  to easily create a `Content-Type: image/png` header.
+    #[inline]
     pub fn png() -> ContentType {
         ContentType(mime!(Image/Png))
     }