, sh => 'sh',
php => 'php',
java => 'java',
yaml => 'yaml',
xml => 'xml',
json => 'json',
html => 'html',
make => 'make',
diff => 'diff',
conf => 'conf',
};
sub par unified diff output.
=item C<perl,ruby,python,php,javascript,haskell,actionscript,html,yaml,xml,json,make,shell,diff>
Specifies that the slide is one of those syntaxen, and that the appropriate
fil