Auto merge of #37327 - aidanhs:aphs-bytes-iter-doc, r=alexcrichton

`as_bytes` is not the iterator on String, `bytes` is

r? @steveklabnik

Author: bors

src/libcollections/string.rs

@@ -135,10 +135,10 @@ use boxed::Box;
 /// Indexing is intended to be a constant-time operation, but UTF-8 encoding
 /// does not allow us to do this. Furthermore, it's not clear what sort of
 /// thing the index should return: a byte, a codepoint, or a grapheme cluster.
-/// The [`as_bytes()`] and [`chars()`] methods return iterators over the first
+/// The [`bytes()`] and [`chars()`] methods return iterators over the first
 /// two, respectively.
 ///
-/// [`as_bytes()`]: #method.as_bytes
+/// [`bytes()`]: #method.bytes
 /// [`chars()`]: #method.chars
 ///
 /// # Deref