[PATCH 2/2] hval: replace "'" with "'" for compatibility

[Eric Wong <e@80x24.org>]

While testing 216light.css changes, I managed to hit some cases
where dillo failed to render ' correctly, but I also can't
reproduce it reliably.  Anyways, it's definitely a problem with
some old browsers and newer versions of highlight already work
around it, but Debian 10.x has 3.41, so use "'" to maximize
compatibility.
---
 lib/PublicInbox/Hval.pm | 3 +++
 t/hl_mod.t              | 3 ---
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/PublicInbox/Hval.pm b/lib/PublicInbox/Hval.pm
index c134e29..4a79439 100644
--- a/lib/PublicInbox/Hval.pm
+++ b/lib/PublicInbox/Hval.pm
@@ -58,8 +58,11 @@ my %xhtml_map = (
 $xhtml_map{chr($_)} = sprintf('\\x%02x', $_) for (0..31);
 %xhtml_map = (%xhtml_map, %escape_sequence);
 
+# for post-processing the output of highlight.pm and perhaps other
+# highlighers in the future
 sub src_escape ($) {
 	$_[0] =~ s/\r\n/\n/sg;
+	$_[0] =~ s/'/'/sg; # workaround https://bugs.debian.org/927409
 	$_[0] =~ s/([\x7f\x00-\x1f])/$xhtml_map{$1}/sge;
 	$_[0] = $enc_ascii->encode($_[0], Encode::HTMLCREF);
 }
diff --git a/t/hl_mod.t b/t/hl_mod.t
index fc7b712..52ef39d 100644
--- a/t/hl_mod.t
+++ b/t/hl_mod.t
@@ -31,9 +31,6 @@ my $orig = $str;
 		my $cmd = [ qw(w3m -T text/html -dump -config /dev/null) ];
 		my ($out, $err) = ('', '');
 
-		# workaround https://bugs.debian.org/927409
-		$$ref =~ s/'/'/sg;
-
 		IPC::Run::run($cmd, \('<pre>'.$$ref.'</pre>'), \$out, \$err);
 		# expand tabs and normalize whitespace,
 		# w3m doesn't preserve tabs