#9747: fix copy-paste error in getresgid() doc.

Doc/library/os.rst

@@ -299,7 +299,7 @@ process and user.
 .. function:: getresgid()
 
    Return a tuple (rgid, egid, sgid) denoting the current process's
-   real, effective, and saved user ids.
+   real, effective, and saved group ids.
 
    Availability: Unix.
 

Modules/posixmodule.c

@@ -7600,7 +7600,7 @@ posix_getresuid (PyObject *self, PyObject *noargs)
 #ifdef HAVE_GETRESGID
 PyDoc_STRVAR(posix_getresgid__doc__,
 "getresgid() -> (rgid, egid, sgid)\n\n\
-Get tuple of the current process's real, effective, and saved user ids.");
+Get tuple of the current process's real, effective, and saved group ids.");
 
 static PyObject*
 posix_getresgid (PyObject *self, PyObject *noargs)