Added more regexs cases for different devices/email providers

[iamshwin]

Also improved code formatting.

[roycehaynes]

Heyo @iamshwin! Thanks for contributing. A couple things:

1/ I don't see new tests that verify your regex solves the use cases you're trying to solve for.

2/ Also, I don't think the code formatting is a significant improvement. However, I do think changes can be made. Can you separate the two major changes (1) regex change made (include tests) and (2) the formatting into two PRs? The latter we can discuss and determine a cleaner way to perhaps auto-format code to some standard.