Enhancements needed to subtitle parser test suite. #93
Description
We need more tests for the parsing code, both unit and comprehensive tests. Comprehensive tests can be made using Aegisub. I am willing to peer program with/work with/mentor anyone who tackles this issue for hacktoberfest as it's a little more complex than some of the other ones we have available. Background as a typesetter for subtitles is useful but not needed.