[PATCH v2 1/8] gitweb: esc_html_hl_regions(): Don't create empty <span> elements

if $s->[1] is equal to or less than $s->[0], esc_html_hl_regions()
generates an empty <span> element.  It normally shouldn't be visible in
the web broweser, but it doesn't look good when looking at page source.
It also minimally increases generated page size for no special reason.

Signed-off-by: Michał Kiedrowicz <redacted>
---

I don't know if any code currently can produce empty <span> elements,
but diff refinement highlighning does it.

 gitweb/gitweb.perl |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index a8b5fad..af645e5 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl

@@ -1738,6 +1738,9 @@ sub esc_html_hl_regions {
 	my $pos = 0;
 
 	for my $s (@sel) {
+		# Don't craete empty <span> elements.
+		next if $s->[1] <= $s->[0];
+
 		$out .= esc_html(substr($str, $pos, $s->[0] - $pos))
 			if ($s->[0] - $pos > 0);
 		$out .= $cgi->span({-class => $css_class},

-- 
1.7.8.4