Optional msgtag format

[ivilata]

This makes the __MSG_*__ format of message tags optional, accepting ^([\w@]+)$ as well. See #1.

Please note that the documentation file for Localizer.js has been updated manually in a different commit, so it's easy to drop if a true update via JSDoc is preferred instead.

[rugk]

Hi @ivilata,
thanks for your first contribution to this project! 🎉 👍 🏅
I hope you'll like this project and enjoy hacking on it… 😃

Interesting solution of just adjusting the fallback, I had rather though of a solution trying to parse the string with the existing RegEx and falling back to the existing string, if that does not work. Would not that be easier?

Also to simplify the RegEx, this could be made:
https://regex101.com/r/W4qrqb/1
I.e. making the optional parts optional and not specifying an alternative inside of it…

Though, also for fail-safety, I'd prefer just to fallback to the existing string in case the RegEx-extraction fails. What do you think?

[rugk]

Also please adjust the Readme as that syntax is now optional…

@ivilata If you need any pointers/help or have questions, feel free to ask.

[ivilata]

Thanks @rugk for the heads up (and for the ping, as I clearly forgot to reply to the previous message).

Commit be32fef should update the readme as requested. Regarding the simplified RegEx, I think that it would also match something like translationName__, so I'll leave it as is for the moment. If you want to accept these too, or whatever other string which doesn't match the RegEx (your fallback suggestion), I guess it's up to you, but somehow out of this PR's scope. 😉

Thanks again and cheers!