Drop tags containing a blank character:

They don't work, they break other tags in weird ways, and even
if they could be made to work, they would be mostly useless.
Issue reported by naddy@, thanks.

diff --git a/usr.bin/mandoc/tag.c b/usr.bin/mandoc/tag.c
index 3b22b4e..3c97d06 100644 (file)
--- a/usr.bin/mandoc/tag.c
+++ b/usr.bin/mandoc/tag.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: tag.c,v 1.8 2015/10/06 18:30:44 schwarze Exp $    */
+/*      $OpenBSD: tag.c,v 1.9 2015/10/11 21:59:48 schwarze Exp $    */
 /*
  * Copyright (c) 2015 Ingo Schwarze <schwarze@openbsd.org>
  *
@@ -119,7 +119,7 @@ tag_put(const char *s, int prio, size_t line)
        size_t                   len;
        unsigned int             slot;
 
-       if (tag_files.tfd <= 0)
+       if (tag_files.tfd <= 0 || strchr(s, ' ') != NULL)
                return;
        slot = ohash_qlookup(&tag_data, s);
        entry = ohash_find(&tag_data, slot);