final fixups; to be squashed

Author: iabyn

dist/ExtUtils-ParseXS/lib/perlxs.pod

@@ -3696,7 +3696,7 @@ to be rewritten more cleanly as:
       PPCODE:
         # return $Foo::Bar::DEBUG, creating it if not already present
         # (NB: XPUSHs() not needed here as the stack always has one
-        allocated slot available when an XSUB is called):
+        # allocated slot available when an XSUB is called):
         PUSHs(GvSV(gv_fetchpvs("Foo::Bar::DEBUG", GV_ADD, SVt_IV)));
 
 The C<ATTRS> keyword allows you to apply subroutine attributes to an XSUB