In a later patch, I want to propose an option to detect&color
moved lines in a diff, which cannot be done in a one-pass over
the diff. Instead we need to go over the whole diff twice,
because we cannot detect the first line of the two corresponding
lines (+ and -) that got moved.

So to prepare the diff machinery for two pass algorithms
(i.e. buffer it all up and then operate on the result),
move all emissions to places, such that the only emitting
function is emit_line_0.

This covers emit_rewrite_lines.

Signed-off-by: Stefan Beller <>
 diff.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/diff.c b/diff.c
index ee4c9d4..3aa99d1 100644
--- a/diff.c
+++ b/diff.c
@@ -690,7 +690,7 @@ static void emit_rewrite_lines(struct emit_callback *ecb,
        if (!endp) {
                const char *context = diff_get_color(ecb->color_diff,
-               putc('\n', ecb->opt->file);
+               emit_line_0(ecb->opt, 0, 0, 0, "\n", 1);
                emit_line_0(ecb->opt, context, reset, '\\',
                            nneof, strlen(nneof));

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