Rollup merge of rust-lang#64042 - juliangehring:string-docs, r=jonas-…

…schievink

Fix word repetition in str documentation

Fixes a few repetitions of "like like" in the `trim*` methods documentation of `str`.

src/libcore/str/mod.rs

@@ -3558,7 +3558,7 @@ impl str {
     /// A string is a sequence of bytes. `start` in this context means the first
     /// position of that byte string; for a left-to-right language like English or
     /// Russian, this will be left side, and for right-to-left languages like
-    /// like Arabic or Hebrew, this will be the right side.
+    /// Arabic or Hebrew, this will be the right side.
     ///
     /// # Examples
     ///
@@ -3595,7 +3595,7 @@ impl str {
     /// A string is a sequence of bytes. `end` in this context means the last
     /// position of that byte string; for a left-to-right language like English or
     /// Russian, this will be right side, and for right-to-left languages like
-    /// like Arabic or Hebrew, this will be the left side.
+    /// Arabic or Hebrew, this will be the left side.
     ///
     /// # Examples
     ///
@@ -3762,7 +3762,7 @@ impl str {
     /// A string is a sequence of bytes. `start` in this context means the first
     /// position of that byte string; for a left-to-right language like English or
     /// Russian, this will be left side, and for right-to-left languages like
-    /// like Arabic or Hebrew, this will be the right side.
+    /// Arabic or Hebrew, this will be the right side.
     ///
     /// # Examples
     ///
@@ -3801,7 +3801,7 @@ impl str {
     /// A string is a sequence of bytes. `end` in this context means the last
     /// position of that byte string; for a left-to-right language like English or
     /// Russian, this will be right side, and for right-to-left languages like
-    /// like Arabic or Hebrew, this will be the left side.
+    /// Arabic or Hebrew, this will be the left side.
     ///
     /// # Examples
     ///