[asciidoc] widen admissible terms in definition list

This is particularly useful for git manpages where command line
options are detailed using definition lists.

lib/Locale/Po4a/AsciiDoc.pm

@@ -526,7 +526,7 @@ sub parse {
             undef $self->{bullet};
             undef $self->{indent};
         } elsif (not defined $self->{verbatim} and
-                 ($line =~ m/^(\s*)([*_+`'#[:alnum:]].*)((?:::|;;|\?\?|:-)(?: *\\)?)$/)) {
+                 ($line =~ m/^(\s*)([-*_+`'#<>[:alnum:]\\"(].*)((?:::|;;|\?\?|:-)(?: *\\)?)$/)) {
             my $indent = $1;
             my $label = $2;
             my $labelend = $3;