viewdiff: reduce sub parameter count

We're slowly moving towards doing all of our output buffering
into a single buffer, so passing that around on the stack as
a dedicated parameter is confusing.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/PublicInbox/View.pm b/lib/PublicInbox/View.pm
index f0584cb7..12ef6431 100644
--- a/lib/PublicInbox/View.pm
+++ b/lib/PublicInbox/View.pm
@@ -589,7 +589,7 @@ sub add_text_body { # callback for msg_iter
                 if ($cur =~ /\A>/) {
                         flush_quote($rv, $l, \$cur);
                 } elsif ($diff) {
-                        flush_diff($rv, $ctx, \$cur);
+                        flush_diff($ctx, \$cur);
                 } else {
                         # regular lines, OK
                         $$rv .= $l->to_html($cur);