Fix a few typos in timer docs. (#569)

Author: jasondavies

tokio-timer/src/timeout.rs

@@ -15,7 +15,7 @@ use std::time::{Instant, Duration};
 
 /// Allows a `Future` or `Stream` to execute for a limited amount of time.
 ///
-/// If thee future or stream completes before the timeout has expired, then
+/// If the future or stream completes before the timeout has expired, then
 /// `Timeout` returns the completed value. Otherwise, `Timeout` returns an
 /// [`Error`].
 ///
@@ -43,7 +43,7 @@ use std::time::{Instant, Duration};
 /// # tx.unbounded_send(()).unwrap();
 /// # drop(tx);
 /// let process = rx.for_each(|item| {
-///     // do something with `iteem`
+///     // do something with `item`
 /// # drop(item);
 /// # Ok(())
 /// });
@@ -55,7 +55,7 @@ use std::time::{Instant, Duration};
 /// # Cancelation
 ///
 /// Cancelling a `Timeout` is done by dropping the value. No additional cleanup
-/// or otheer work is required.
+/// or other work is required.
 ///
 /// The original future or stream may be obtained by calling [`into_inner`]. This
 /// consumes the `Timeout`.

tokio-timer/src/wheel/mod.rs

@@ -75,7 +75,7 @@ where
     }
 
     /// Return the number of milliseconds that have elapsed since the timing
-    /// wheele's creation.
+    /// wheel's creation.
     pub fn elapsed(&self) -> u64 {
         self.elapsed
     }