docs: replace some html links with rustdoc paths (#2381)

Included changes
- all simple references like `<type>.<name>.html` for these types
    - enum
    - fn
    - struct
    - trait
    - type
- simple references for methods, like struct.DelayQueue.html#method.poll

Refs: #1473

5 files changed, 13 insertions, 13 deletions

diff --git a/tokio/src/io/mod.rs b/tokio/src/io/mod.rs
index 6d6edf55..29d8bc55 100644
--- a/tokio/src/io/mod.rs
+++ b/tokio/src/io/mod.rs
@@ -138,20 +138,20 @@
 //! context of the Tokio runtime, as they require Tokio-specific features to
 //! function. Calling these functions outside of a Tokio runtime will panic.
 //!
-//! [input]: fn.stdin.html
-//! [output]: fn.stdout.html
-//! [error]: fn.stderr.html
+//! [input]: fn@stdin
+//! [output]: fn@stdout
+//! [error]: fn@stderr
 //!
 //! # `std` re-exports
 //!
 //! Additionally, [`Error`], [`ErrorKind`], and [`Result`] are re-exported
 //! from `std::io` for ease of use.
 //!
-//! [`AsyncRead`]: trait.AsyncRead.html
-//! [`AsyncWrite`]: trait.AsyncWrite.html
-//! [`Error`]: struct.Error.html
-//! [`ErrorKind`]: enum.ErrorKind.html
-//! [`Result`]: type.Result.html
+//! [`AsyncRead`]: trait@AsyncRead
+//! [`AsyncWrite`]: trait@AsyncWrite
+//! [`Error`]: struct@Error
+//! [`ErrorKind`]: enum@ErrorKind
+//! [`Result`]: type@Result
 //! [`Read`]: std::io::Read
 //! [`Write`]: std::io::Write
 cfg_io_blocking! {
diff --git a/tokio/src/io/poll_evented.rs b/tokio/src/io/poll_evented.rs
index 2cf9a043..298e6e58 100644
--- a/tokio/src/io/poll_evented.rs
+++ b/tokio/src/io/poll_evented.rs
@@ -95,7 +95,7 @@ cfg_io_driver! {
     /// [`AsyncRead`]: ../io/trait.AsyncRead.html
     /// [`AsyncWrite`]: ../io/trait.AsyncWrite.html
     /// [`mio::Evented`]: https://docs.rs/mio/0.6/mio/trait.Evented.html
-    /// [`Registration`]: struct.Registration.html
+    /// [`Registration`]: struct@Registration
     /// [`TcpListener`]: ../net/struct.TcpListener.html
     /// [`clear_read_ready`]: #method.clear_read_ready
     /// [`clear_write_ready`]: #method.clear_write_ready
diff --git a/tokio/src/io/stdin.rs b/tokio/src/io/stdin.rs
index 634bd484..214c4d05 100644
--- a/tokio/src/io/stdin.rs
+++ b/tokio/src/io/stdin.rs
@@ -20,8 +20,8 @@ cfg_io_std! {
     ///
     /// Created by the [`stdin`] function.
     ///
-    /// [`stdin`]: fn.stdin.html
-    /// [`AsyncRead`]: trait.AsyncRead.html
+    /// [`stdin`]: fn@stdin
+    /// [`AsyncRead`]: trait@AsyncRead
     #[derive(Debug)]
     pub struct Stdin {
         std: Blocking<std::io::Stdin>,
diff --git a/tokio/src/io/util/empty.rs b/tokio/src/io/util/empty.rs
index 7075612f..121102c7 100644
--- a/tokio/src/io/util/empty.rs
+++ b/tokio/src/io/util/empty.rs
@@ -13,7 +13,7 @@ cfg_io_util! {
     ///
     /// This is an asynchronous version of [`std::io::empty`][std].
     ///
-    /// [`empty`]: fn.empty.html
+    /// [`empty`]: fn@empty
     /// [std]: std::io::empty
     pub struct Empty {
         _p: (),
diff --git a/tokio/src/io/util/repeat.rs b/tokio/src/io/util/repeat.rs
index 064775ee..6b9067e8 100644
--- a/tokio/src/io/util/repeat.rs
+++ b/tokio/src/io/util/repeat.rs
@@ -13,7 +13,7 @@ cfg_io_util! {
     ///
     /// This is an asynchronous version of [`std::io::Repeat`][std].
     ///
-    /// [repeat]: fn.repeat.html
+    /// [repeat]: fn@repeat
     /// [std]: std::io::Repeat
     #[derive(Debug)]
     pub struct Repeat {