=== modified file 'log.awk'
--- log.awk	2014-07-02 14:24:45 +0000
+++ log.awk	2014-07-02 14:13:52 +0000
@@ -33,9 +33,7 @@
 		print "* rev. **"revno"** by *"mangle(revnos[revno,"committer"])"* "into"at "revnos[revno,"time"]
 		for (n=1; n <= revnos[revno,"parents"]; n++) {
 			p_revid = revnos[revno,"parent",n]
-			rev_range=revnos[revno,"revid"]".."p_revid
-			gsub(/[:%/?*]/, "_", rev_range)
-			print "* parent: `"revids[p_revid]"`_ `diff <diff/"rev_range">`__"
+			print "* parent: `"revids[p_revid]"`_ `diff <diff/"revnos[revno,"revid"]".."p_revid">`__"
 		}
 		print "\n::\n\n" revnos[revno,"message"]
 	}