Amended wording

Author: reedwoodruff

library/alloc/src/string.rs

@@ -260,8 +260,8 @@ use crate::vec::Vec;
 /// # Representation
 ///
 /// A `String` is made up of three components: a pointer to some bytes, a
-/// length, and a capacity. The pointer points to an internal buffer `String`
-/// used to store its data. The length is the number of bytes currently stored
+/// length, and a capacity. The pointer points to the internal buffer which `String`
+/// uses to store its data. The length is the number of bytes currently stored
 /// in the buffer, and the capacity is the size of the buffer in bytes. As such,
 /// the length will always be less than or equal to the capacity.
 ///