[PATCH] D28316: [libc++] Cleanup and document <__threading_support>

[Shoaib Meenai via Phabricator via cfe-commits]

smeenai added inline comments.


================
Comment at: docs/DesignDocs/ThreadingSupportAPI.rst:17
+
+The ``<__threading_support>`` header is where libc++ defines it's internal
+threading interface. It contains forward declarations of the internal threading
----------------
s/it's/its


https://reviews.llvm.org/D28316