From 99b311f69a5e662a19069417dc2a37847722d914 Mon Sep 17 00:00:00 2001
From: Mischa POSLAWSKY <perl@shiar.org>
Date: Mon, 16 Mar 2015 18:31:54 +0100
Subject: [PATCH] font: append placeholder circle to combining marks

---
 font.plp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/font.plp b/font.plp
index 75f0198..a7812d0 100644
--- a/font.plp
+++ b/font.plp
@@ -91,11 +91,13 @@ EOT
 		my $info = $glyphs->glyph_info($cp);
 		my ($class, $name, $mnem, $html, $string) = @{$info};
 		my $np = $class =~ /\bC\S\b/;  # noprint if control or invalid
+		# display literal character, with placeholder circle if non-spacing/enclosing
+		my $html = ($class =~ /\bM[ne]\b/ && chr 9676) . EscapeHTML(chr $cp);
 		say sprintf '<td class="%s" title="U+%04X%s">%s',
 			!$class ? ('l0', $cp, '', '') :
 			$cover{$cp} ? $np ? 'l2' : 'l5' : $np ? 'Xi' : 'l1',
 			$cp, !!$name && ": $name",
-			($cover{$cp} || !$np) && EscapeHTML(chr $cp);
+			($cover{$cp} || !$np) && $html;
 	}
 	say '</table>';
 
-- 
2.30.0