fix feature name from rust1.1 to rust1_1

Author: rapha

src/libstd/sync/mpsc/mod.rs

@@ -309,7 +309,7 @@ pub struct Iter<'a, T: 'a> {
 /// An owning iterator over messages on a receiver, this iterator will block
 /// whenever `next` is called, waiting for a new message, and `None` will be
 /// returned when the corresponding channel has hung up.
-#[stable(feature = "rust1.1", since = "1.1.0")]
+#[stable(feature = "rust1_1", since = "1.1.0")]
 pub struct IntoIter<T> {
     rx: Receiver<T>
 }
@@ -907,7 +907,7 @@ impl<'a, T> Iterator for Iter<'a, T> {
     fn next(&mut self) -> Option<T> { self.rx.recv().ok() }
 }
 
-#[stable(feature = "rust1.1", since = "1.1.0")]
+#[stable(feature = "rust1_1", since = "1.1.0")]
 pub struct IntoIter<T> {
 impl<'a, T> IntoIterator for &'a Receiver<T> {
     type Item = T;
@@ -921,7 +921,7 @@ impl<T> Iterator for IntoIter<T> {
     fn next(&mut self) -> Option<T> { self.rx.recv().ok() }
 }
 
-#[stable(feature = "rust1.1", since = "1.1.0")]
+#[stable(feature = "rust1_1", since = "1.1.0")]
 impl <T> IntoIterator for Receiver<T> {
     type Item = T;
     type IntoIter = IntoIter<T>;