X-Git-Url: http://git.shiar.net/perl/list-index.git/blobdiff_plain/d6c30ef4ef400982bc1b08e9b7bf93993ea29be5..319dd675faee700a9fa0485863889a661ef9dc53:/lib/List/Index.pm

diff --git a/lib/List/Index.pm b/lib/List/Index.pm
index c42db44..00f2bdb 100644
--- a/lib/List/Index.pm
+++ b/lib/List/Index.pm
@@ -29,7 +29,7 @@ sub ranges {
 		my $link = substr $self->[$offset], 0, $length;
 		if ($context) {
 			my $trim = 1;
-			my $before = $offset > $context ? $self->[$offset - $context] : '';
+			my $before = $offset > $context ? $self->[$offset - $context] : '.';
 			for my $match (split //, $before) {
 				scalar $link =~ /\G\Q$match/g or last;
 				$trim++;
@@ -43,8 +43,9 @@ sub ranges {
 
 	for my $i (0 .. $#links - 1) {
 		my ($link, $lastchar) = $links[$i + 1]->[0] =~ /(.*)(.)/;
-		$link .= $lastchar eq '.' ? 'a' : chr( ord($lastchar) - 1 )
-			unless $lastchar eq 'a';
+		$link .= $lastchar eq 'a' ? '.' : chr( ord($lastchar) - 1 )
+			unless $lastchar eq '.';
+		next if $link eq $links[$i]->[0];
 		$links[$i]->[1] = $link;
 	}
 	$links[-1]->[1] = '';