git_unquote works in-place, and we sometimes see strange
filenames, or badly munged diffs with terminal escape
characters (for colorization) end up in emails.
---
 lib/PublicInbox/SearchIdx.pm | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/PublicInbox/SearchIdx.pm b/lib/PublicInbox/SearchIdx.pm
index f265fa7f..926fac80 100644
--- a/lib/PublicInbox/SearchIdx.pm
+++ b/lib/PublicInbox/SearchIdx.pm
@@ -204,11 +204,13 @@ sub index_diff ($$$) {
                        $in_diff = $self->index_old_diff_fn(\%seen, $fa, $fb,
                                                        $xnq);
                } elsif (m!^--- ("?a/.+)!) {
-                       my $fn = (split('/', git_unquote($1), 2))[1];
+                       my $fn = $1;
+                       $fn = (split('/', git_unquote($fn), 2))[1];
                        $seen{$fn}++ or $self->index_diff_inc($fn, 'XDFN', 
$xnq);
                        $in_diff = 1;
                } elsif (m!^\+\+\+ ("?b/.+)!)  {
-                       my $fn = (split('/', git_unquote($1), 2))[1];
+                       my $fn = $1;
+                       $fn = (split('/', git_unquote($fn), 2))[1];
                        $seen{$fn}++ or $self->index_diff_inc($fn, 'XDFN', 
$xnq);
                        $in_diff = 1;
                } elsif (/^--- (\S+)/) {
--
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