No code is generated for pattern match in spite of side effects

[snoopyjc]

No code is generated for pattern match in spite of side effects. For example:

"976562500000000" =~ /(\d+)/;

is an expression and generates no code. Instead it needs to run the pattern match which sets $1 to the matching pattern.

[snoopyjc]

Fixed in https://github.com/snoopyjc/pythonizer