Create sample file for python2 env

Created a sample file that includes the env of 'python2', which had caused the python file at https://github.com/mstill/thunner/blob/c3ede9b791a23266c8a19387868a1650161a6833/thunner to be incorrectly detected, causing an unmatched single quote that was in fact an apostrophe in a comment, however the comment wasn't detected as a comment since it did not know that it was a python file.