Document PyThreadState_GET()

Author: vstinner

Doc/c-api/threads.rst

@@ -599,6 +599,11 @@ C extensions.
       Hangs the current thread, rather than terminating it, if called while the
       interpreter is finalizing.
 
+.. c:function:: PyThreadState* PyThreadState_GET()
+
+   Alias to :c:func:`PyThreadState_Get`.
+
+
 .. c:function:: PyThreadState* PyThreadState_Get()
 
    Return the :term:`attached thread state`. If the thread has no attached