Break overly-long lines in type constructor list in import list

[hseg]

Example:

import Language.Haskell.Syntax (HsExportSpec(HsEVar, HsEAbs, HsEThingAll, HsEThingWith, HsEModuleContents)

should be converted to

import Language.Haskell.Syntax (HsExportSpec(HsEVar, HsEAbs, HsEThingAll,
                                             HsEThingWith, HsEModuleContents)

(Note that I'm starting a new line after the last constructor which is still within 80 chars
from the end of the line.)

[ababkin]

Just wanted to bump this since It's 4 years old and is still a very relevant wart. Can this be kindly prioritized? Thanks

[dfithian]

👍