Apply only specific whitelist of transformations

[ryan-williams]

Cross-posting from https://github.com/sbt/sbt-scalariform/issues/52…

I recently wanted to only enforce the "spaces inside curly-braces in multi-import statements" Scalariform transformation (using the SBT plugin, though I suspect the cause is upstream / in this repo).

I couldn't find a way to do that; all my attempts made other changes to the codebase that I didn't want, e.g. to arguments' spacing/line-wrapping.

I resorted to:

git ls-files | xargs perl -pi -e 's/^import (.*)\{([^ ].*[^ ])\}/import \1\{ \2 \}/'

😢