> Like I'm not going to read through a 100 character regex to see if it matches semantic versions, I'm just gonna pull it up on a regular expression tester and see if it does what it should.

How? Do you have all the values from the semantic versions lying around for a comprehensive test in the engine?

But also those 100 chars can be in 10 lines with comments, so you can fire the engine on specific parts to help with verification