diff --git a/src/libcollections/str.rs b/src/libcollections/str.rs
index 23c21a732b52..2f74ab5026e9 100644
--- a/src/libcollections/str.rs
+++ b/src/libcollections/str.rs
@@ -715,8 +715,7 @@ pub fn ends_with<'a, P: Pattern<'a>>(&'a self, pat: P) -> bool
     /// Returns `None` if it doesn't exist.
     ///
     /// The pattern can be a simple `&str`, `char`, or a closure that
-    /// determines the
-    /// split.
+    /// determines if a character matches.
     ///
     /// # Examples
     ///
@@ -760,7 +759,7 @@ pub fn find<'a, P: Pattern<'a>>(&'a self, pat: P) -> Option<usize> {
     /// Returns `None` if it doesn't exist.
     ///
     /// The pattern can be a simple `&str`, `char`,
-    /// or a closure that determines the split.
+    /// or a closure that determines if a character matches.
     ///
     /// # Examples
     ///
@@ -1096,7 +1095,7 @@ pub fn rsplitn<'a, P: Pattern<'a>>(&'a self, count: usize, pat: P) -> RSplitN<'a
     /// An iterator over the matches of a pattern within `self`.
     ///
     /// The pattern can be a simple `&str`, `char`, or a closure that
-    /// determines the split.
+    /// determines if a character matches.
     /// Additional libraries might provide more complex patterns like
     /// regular expressions.
     ///
@@ -1129,7 +1128,7 @@ pub fn matches<'a, P: Pattern<'a>>(&'a self, pat: P) -> Matches<'a, P> {
     /// reverse order.
     ///
     /// The pattern can be a simple `&str`, `char`, or a closure that
-    /// determines the split.
+    /// determines if a character matches.
     /// Additional libraries might provide more complex patterns like
     /// regular expressions.
     ///
@@ -1166,8 +1165,7 @@ pub fn rmatches<'a, P: Pattern<'a>>(&'a self, pat: P) -> RMatches<'a, P>
     /// match are returned.
     ///
     /// The pattern can be a simple `&str`, `char`, or a closure that
-    /// determines
-    /// the split.
+    /// determines if a character matches.
     /// Additional libraries might provide more complex patterns like
     /// regular expressions.
     ///
@@ -1214,8 +1212,7 @@ pub fn match_indices<'a, P: Pattern<'a>>(&'a self, pat: P) -> MatchIndices<'a, P
     /// match are returned.
     ///
     /// The pattern can be a simple `&str`, `char`, or a closure that
-    /// determines
-    /// the split.
+    /// determines if a character matches.
     /// Additional libraries might provide more complex patterns like
     /// regular expressions.
     ///
@@ -1296,7 +1293,7 @@ pub fn trim_right(&self) -> &str {
     /// repeatedly removed.
     ///
     /// The pattern can be a simple `char`, or a closure that determines
-    /// the split.
+    /// if a character matches.
     ///
     /// # Examples
     ///
@@ -1326,7 +1323,7 @@ pub fn trim_matches<'a, P: Pattern<'a>>(&'a self, pat: P) -> &'a str
     /// repeatedly removed.
     ///
     /// The pattern can be a simple `&str`, `char`, or a closure that
-    /// determines the split.
+    /// determines if a character matches.
     ///
     /// # Examples
     ///
@@ -1346,7 +1343,7 @@ pub fn trim_left_matches<'a, P: Pattern<'a>>(&'a self, pat: P) -> &'a str {
     /// repeatedly removed.
     ///
     /// The pattern can be a simple `&str`, `char`, or a closure that
-    /// determines the split.
+    /// determines if a character matches.
     ///
     /// # Examples
     ///