Added URL to HOWTO page, with reference to Regex HOWTO. Corrected error: {,5} is not equivalent to {0,5}.
Added URL to HOWTO page, with reference to Regex HOWTO.
Corrected error: {,5} is not equivalent to {0,5}.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator