[PATCH] diff.c: die on unknown color-moved ws mode

[Stefan Beller <sbeller@google.com>]

Noticed-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Stefan Beller <sbeller@google.com>
--- 


   There is no "ignore-any" supported by the feature---I think that
   the parser for the option should have noticed and barfed, but it
   did not.  It merely emitted a message to the standard output and
   let it scroll away with the huge diff before the reader noticed
   it.
   
Addressed in this patch.

   Am I missing something [...] ?

Note that this parsing is used for both the parsing from command line
as well as options, i.e.

  git config diff.colorMovedWS asdf
  git format-patch HEAD^
fatal: ignoring unknown color-moved-ws mode 'asdf'
  git config --unset diff.colorMovedWS

(format-patch parses these color specific things, but doesn't apply it)
   
 diff.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/diff.c b/diff.c
index 145cfbae59..bdf4535d69 100644
--- a/diff.c
+++ b/diff.c
@@ -313,7 +313,7 @@ static int parse_color_moved_ws(const char *arg)
 		else if (!strcmp(sb.buf, "allow-indentation-change"))
 			ret |= COLOR_MOVED_WS_ALLOW_INDENTATION_CHANGE;
 		else
-			error(_("ignoring unknown color-moved-ws mode '%s'"), sb.buf);
+			die(_("ignoring unknown color-moved-ws mode '%s'"), sb.buf);
 
 		strbuf_release(&sb);
 	}
-- 
2.19.0