mdocml: Make it clear which errors come from which tool.

mdocml: Make it clear which errors come from which tool.

[schwarze]

Log Message:
-----------
Make it clear which errors come from which tool.
joint work with sthen@

Modified Files:
--------------
    mdocml:
        gmdiff

Revision Data
-------------
Index: gmdiff
===================================================================
RCS file: /usr/vhosts/mdocml.bsd.lv/cvs/mdocml/gmdiff,v
retrieving revision 1.1
retrieving revision 1.2
diff -Lgmdiff -Lgmdiff -u -p -r1.1 -r1.2
--- gmdiff
+++ gmdiff
@@ -1,5 +1,5 @@
 #!/bin/sh
-# Copyright (c) 2013 Ingo Schwarze <schwarze@openbsd.org>
+# Copyright (c) 2013, 2014 Ingo Schwarze <schwarze@openbsd.org>
 #
 # Permission to use, copy, modify, and distribute this software for any
 # purpose with or without fee is hereby granted, provided that the above
@@ -27,8 +27,11 @@ while [ -n "$1" ]; do
   file=$1
   shift
   echo " ========== $file ========== "
-  tbl $file | groff -mandoc -Tascii -P -c 2>&1 > /tmp/groff.out
-  mandoc -Ios='OpenBSD ports' -Werror $file 2>&1 > /tmp/mandoc.out
+  tbl $file | groff -mandoc -Tascii -P -c 2> /tmp/groff.err > /tmp/groff.out
+  mandoc -Ios='OpenBSD ports' -Werror $file 2> /tmp/mandoc.err > /tmp/mandoc.out
+  for i in groff mandoc; do
+    [[ -s /tmp/$i.err ]] && echo "$i errors:" && cat /tmp/$i.err
+  done
   diff -au /tmp/groff.out /tmp/mandoc.out 2>&1
 done
 
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