[PATCH 07/14] range-diff: respect diff_option.file rather than assuming 'stdout'

The actual diffs output by range-diff respect diff_option.file, which
range-diff passes down the call-chain, thus are destination-agnostic.
However, output_pair_header() is hard-coded to emit to 'stdout'. Fix
this by making output_pair_header() respect diff_option.file, as well.

Signed-off-by: Eric Sunshine <redacted>
---
 range-diff.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/range-diff.c b/range-diff.c
index 347b4a79f2..76e053c2b2 100644
--- a/range-diff.c
+++ b/range-diff.c

@@ -328,7 +328,7 @@ static void output_pair_header(struct diff_options *diffopt,
 	}
 	strbuf_addf(buf, "%s\n", color_reset);
 
-	fwrite(buf->buf, buf->len, 1, stdout);
+	fwrite(buf->buf, buf->len, 1, diffopt->file);
 }
 
 static struct userdiff_driver no_func_name = {

-- 
2.18.0.345.g5c9ce644c3