Export of internal Abseil changes.

--
f4bb8afa9376b4120f56f3beff7b07260da4a5c2 by CJ Johnson <johnsoncj@google.com>:

Add user to Github list

PiperOrigin-RevId: 209630262
GitOrigin-RevId: f4bb8afa9376b4120f56f3beff7b07260da4a5c2
Change-Id: I3fedf35011d805ee4a20b92e073b43523b47d15b

absl/strings/internal/str_join_internal.h

@@ -189,7 +189,7 @@ struct DefaultFormatter<std::unique_ptr<ValueType>>
 //
 
 // The main joining algorithm. This simply joins the elements in the given
-// iterator range, each separated by the given separator, into an output std::string,
+// iterator range, each separated by the given separator, into an output string,
 // and formats each element using the provided Formatter object.
 template <typename Iterator, typename Formatter>
 std::string JoinAlgorithm(Iterator start, Iterator end, absl::string_view s,
@@ -205,20 +205,20 @@ std::string JoinAlgorithm(Iterator start, Iterator end, absl::string_view s,
 }
 
 // A joining algorithm that's optimized for a forward iterator range of
-// std::string-like objects that do not need any additional formatting. This is to
-// optimize the common case of joining, say, a std::vector<std::string> or a
+// string-like objects that do not need any additional formatting. This is to
+// optimize the common case of joining, say, a std::vector<string> or a
 // std::vector<absl::string_view>.
 //
 // This is an overload of the previous JoinAlgorithm() function. Here the
 // Formatter argument is of type NoFormatter. Since NoFormatter is an internal
 // type, this overload is only invoked when strings::Join() is called with a
-// range of std::string-like objects (e.g., std::string, absl::string_view), and an
+// range of string-like objects (e.g., string, absl::string_view), and an
 // explicit Formatter argument was NOT specified.
 //
 // The optimization is that the needed space will be reserved in the output
-// std::string to avoid the need to resize while appending. To do this, the iterator
+// string to avoid the need to resize while appending. To do this, the iterator
 // range will be traversed twice: once to calculate the total needed size, and
-// then again to copy the elements and delimiters to the output std::string.
+// then again to copy the elements and delimiters to the output string.
 template <typename Iterator,
           typename = typename std::enable_if<std::is_convertible<
               typename std::iterator_traits<Iterator>::iterator_category,