Trim only one line at start and end

[dword-design]

This PR fixes start and end trimming by only trimming one newline each. This enables us to create real newlines instead of explicit newlines (those are removed), so the strings are much cleaner.

Closes #41

[dword-design]

@dmnd Any chance to get this merged?

[JoshuaKGoldberg]

fixes start and end trimming by only trimming one newline each

@dword-design is there a reason why you'd want this? Dedenting a string doesn't necessarily need to include trimming newlines from the start and/or end. Some users might not want that.

I wonder if this should be an opt-in option? Or just not in the purview of dedent specifically?

[dword-design]

I think I mainly added this for trailing newlines in strings written to a file. I'd say probably don't need it anymore but I still think that the user has more possibilities. So he could add more newlines to the start or end but doesn't need to.

[JoshuaKGoldberg]

Ok interesting - similar to #29 I think it'd be good to talk in an issue first. I'll close this PR to keep the queue small, but not saying no! Just hoping to discuss :)

Thanks!

[JoshuaKGoldberg]

Marking as requested changes for housekeeping purposes - let's discuss whether this should happen first?

(not saying 'no' - just starting a thread!)