[Fix #943] Fix auto-correct interference with SpaceAfterComma

The SpaceAfterComma (and possibly other cops that include
SpaceAfterPunctuation) can destroy code if other cops are auto-
correcting in the same area. The solution is to make a bigger
substitution, so conflict resolution logic kicks in.
Merge pull request #951 from jonas054/fix_943_autocorrect

[Fix #943] Fix auto-correct interference with SpaceAfterComma