add : to signoff trailer

[semioticrobotic]

This pull request addresses #2196.

It adds a : character to the signoff trailer by default. This character is necessary for complying with the Conventional Commits standard.

I am not a software developer, and unfortunately I do not know how to perform further actions (such as running local tests, etc.). So I will need to request help from someone more knowledgable.

[semioticrobotic]

Thanks for the opportunity, @extrawurst!

[matthiasbeyer]

Looks good to me.

[domtac]

@semioticrobotic Thanks for adding that. This totally slipped my eye. I originally added it, as I need it for the projects I am working on. Nobody complained so far ;)
But thanks to you it will soon be compliant. Thanks

[semioticrobotic]

Oops! Sorry, @matthiasbeyer, for that ping. 👆 I accidentally hit the "re-request review" button. 😅 I've not made any changes to the patch.

And thanks, @domtac, for your kind words! I'm delighted to be able to add this (and my organization's linter sure will love me for it).

[extrawurst]

@semioticrobotic thanks for tackling this. can you please see the PR checklist and at the very least provide a changelog entry that matches the projects style and at best also a unittest that calls add_sign_off ?

[semioticrobotic]

Sure thing, @extrawurst. I'm not a software developer, so don't really know how to run unittests or anything of the sort (maybe @domtac can help?). But I can gladly add an item to the changelog.

(Update: Apologies, as I see actually @matthiasbeyer has been added as requested reviewer. Thanks!)