Can we ignore haddocks in fix-whitespace?

[philderbeast]

Describe the feature request
When I run fix-whitespace --check after generating haddocks, the haddocks files trigger whitespace violations.

$ cabal haddock-project
$ fix-whitespace --check 2&> whitespace-violations.txt

whitespace-violations.txt

Can we please add the haddocks folder to the exclusion list in fix-whitespace.yaml:

cabal/fix-whitespace.yaml

Lines 28 to 34 in c5c2072

	excluded-dirs:
	- "**/dist*" # matches every dist* in any directory
	- _darcs
	- .git
	- doc/.venv
	- .stack-work
	- .vscode