[#226] Check for puzzle maker only TODO followed by : or space

[pnatashap]

1. Check for puzzle maker only TODO followed by : or space
2. add require_relative 'test_helper' to run one file with tests (as described in README)

[php-coder]

nit: git history would be cleaner if you rebase the branch against master (instead of merging) nit: consider including into description a special keyword to automatically close related issue (see https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue for details)

[pnatashap]

nit: git history would be cleaner if you rebase the branch against master (instead of merging) nit: consider including into description a special keyword to automatically close related issue (see https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue for details)

it was automatically, most of my projects required to merge, will do it next time. Thanks

[yegor256]

@rultor merge

[rultor]

@rultor merge

@yegor256 OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor merge

@yegor256 Done! FYI, the full log is here (took me 4min)