Add new checker for Tcl

[bsless]

Add new checker for Tcl

Add new checker for Tcl and general support for Tcl, including simple test file.

Also fix tiny grammatical error in a comment.

[CLAassistant]

All committers have signed the CLA.

[cpitclaudel]

Looks great, thanks! Do you think you could add an entry in CHANGES? :)

[bsless]

Thanks!
This is my first pull request and I'm still figuring things out, so, I'd love to add any entry you'd like if you could point me to the relevant location

[bsless]

Adds support for the Nagelfar Tcl syntax checker, revert change to PIP path to work on local machine

[cpitclaudel]

Thanks to you! And welcome aboard :)
The change log is here: https://github.com/flycheck/flycheck/blob/master/CHANGES.rst. You can edit it like the other files.

[bsless]

Thanks for the direction, got it figured out eventually 😄
Seems like some tests fail due to disk quota. Do they need to be run again?

[cpitclaudel]

Sorry about the tests ! They're all good now.
Great job on your first Flycheck PR! Let's hope there'll be plenty more ^^

[bsless]

Thank you! It's been lots of fun, and your directions were helpful.
I hope to find more opportunities to contribute 😃
Can I close the branch now?