doc: correct spelling in documentation.

src/libstd/vec.rs

@@ -468,7 +468,7 @@ impl<'self, T> Iterator<&'self [T]> for WindowIter<'self, T> {
 /// elements at a time).
 ///
 /// When the vector len is not evenly divided by the chunk size,
-/// the last slice of the iteration will be the remainer.
+/// the last slice of the iteration will be the remainder.
 #[deriving(Clone)]
 pub struct ChunkIter<'self, T> {
     priv v: &'self [T],
@@ -1930,7 +1930,7 @@ pub mod raw {
      * Sets the length of a vector
      *
      * This will explicitly set the size of the vector, without actually
-     * modifing its buffers, so it is up to the caller to ensure that
+     * modifying its buffers, so it is up to the caller to ensure that
      * the vector is actually the specified size.
      */
     #[inline]