Regex with DEFAULT_VAR and capturing groups needs to always set the DEFAULT_MATCH

[snoopyjc]

Regex with DEFAULT_VAR and capturing groups needs to always set the DEFAULT_MATCH. There are cases in the code where it's not set, but if the user then refers to $1 etc, that gives an error.

[snoopyjc]

Fixed in my v0.956 https://github.com/snoopyjc/pythonizer/