Feature request: add option to skip auto-format if too many lines change

[jm355]

I've run into this several times now, where I pull someone elses code to make a small pull request or change, make my change, and then save and the entire file used a different format to what helix expected, so the entire file has changed.

I don't want to disable auto-format entirely since I like it for my files, and it is possible to isolate the whitespace-only changes in git, but it would be nice to be able to have auto-format maybe only act on the lines I changed, and/or have them match the current file style. Especially for whitespace/indentation

[nik-rev]

the actual solution would be to allow formatting a range: #3209

You can already disable auto-formatting with :toggle auto-format, and the above would give you the desired behaviour