Need a way to run only a single or selected rules

[hughbe]

E.g. we want to have separate commits for whitespace changes, brace changes and spacing changes
/cc @zsd4yr

[JoeRobich]

@hughbe This might be a bit tricky, the WhitespaceFormatter formats all whitespace in one go including indentation, newlines before braces, spacing around punctuation and operators, etc...

[sharwell]

It should be possible to run each of the rules separately (e.g. format document, end-of-line handling, end-of-file handling, and each analyzer/code fix pair), but it will not be possible to split format document into finer granularity.

[JoeRobich]

#1007 added the ability to target code style or 3rd party diagnostics by their diagnostic id.