Deny warnings for doc tests (#391)

src/buf/ext/mod.rs

@@ -27,7 +27,7 @@ pub trait BufExt: Buf {
     /// # Examples
     ///
     /// ```
-    /// use bytes::{Buf, BufMut, buf::BufExt};
+    /// use bytes::{BufMut, buf::BufExt};
     ///
     /// let mut buf = b"hello world"[..].take(5);
     /// let mut dst = vec![];
@@ -79,7 +79,7 @@ pub trait BufExt: Buf {
     /// # Examples
     ///
     /// ```
-    /// use bytes::{Buf, Bytes, buf::BufExt};
+    /// use bytes::{Bytes, buf::BufExt};
     /// use std::io::Read;
     ///
     /// let buf = Bytes::from("hello world");
@@ -135,7 +135,7 @@ pub trait BufMutExt: BufMut {
     /// # Examples
     ///
     /// ```
-    /// use bytes::{BufMut, buf::BufMutExt};
+    /// use bytes::buf::BufMutExt;
     /// use std::io::Write;
     ///
     /// let mut buf = vec![].writer();

src/buf/ext/reader.rs

@@ -26,7 +26,7 @@ impl<B: Buf> Reader<B> {
     /// ```rust
     /// use bytes::buf::BufExt;
     ///
-    /// let mut buf = b"hello world".reader();
+    /// let buf = b"hello world".reader();
     ///
     /// assert_eq!(b"hello world", buf.get_ref());
     /// ```

src/buf/ext/take.rs

@@ -22,7 +22,7 @@ impl<T> Take<T> {
     /// # Examples
     ///
     /// ```rust
-    /// use bytes::buf::{Buf, BufMut, BufExt};
+    /// use bytes::buf::{BufMut, BufExt};
     ///
     /// let mut buf = b"hello world".take(2);
     /// let mut dst = vec![];
@@ -49,7 +49,7 @@ impl<T> Take<T> {
     /// ```rust
     /// use bytes::{Buf, buf::BufExt};
     ///
-    /// let mut buf = b"hello world".take(2);
+    /// let buf = b"hello world".take(2);
     ///
     /// assert_eq!(11, buf.get_ref().remaining());
     /// ```
@@ -110,7 +110,7 @@ impl<T> Take<T> {
     /// # Examples
     ///
     /// ```rust
-    /// use bytes::{Buf, BufMut, buf::BufExt};
+    /// use bytes::{BufMut, buf::BufExt};
     ///
     /// let mut buf = b"hello world".take(2);
     /// let mut dst = vec![];

src/buf/ext/writer.rs

@@ -26,7 +26,7 @@ impl<B: BufMut> Writer<B> {
     /// ```rust
     /// use bytes::buf::BufMutExt;
     ///
-    /// let mut buf = Vec::with_capacity(1024).writer();
+    /// let buf = Vec::with_capacity(1024).writer();
     ///
     /// assert_eq!(1024, buf.get_ref().capacity());
     /// ```