Fix linkify with latex

Author: sujanadiga

ansi2html/converter.py

@@ -178,7 +178,7 @@ def append_color_unless_default(output, color, default, negative, neg_css_class)
 def linkify(line, latex_mode):
     url_matcher = re.compile('(https?://(?:[-\w.]|(?:%[\da-fA-F]{2}))+)')
     if latex_mode:
-        return url_matcher.sub(r'\\url{\1}', line)
+        return url_matcher.sub(r'\\\\url{\1}', line)
     else:
         return url_matcher.sub(r'<a href="\1">\1</a>', line)