replace: replace spaces with tabs in indentation

This matches our usual style and the surrounding code.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin/replace.c b/builtin/replace.c
index 1bb491d..8507835 100644
--- a/builtin/replace.c
+++ b/builtin/replace.c
@@ -23,9 +23,9 @@
 };
 
 enum replace_format {
-      REPLACE_FORMAT_SHORT,
-      REPLACE_FORMAT_MEDIUM,
-      REPLACE_FORMAT_LONG
+	REPLACE_FORMAT_SHORT,
+	REPLACE_FORMAT_MEDIUM,
+	REPLACE_FORMAT_LONG
 };
 
 struct show_data {