zig fmt: Resolve #11131 loss of comment on switch cases

Correct switch cases dropping comments in certain situations by
checking for the presence of the comment before collapsing to one line.
3bb4c0c789Curtis Tate Wilkinson committed on 3/14/2022, 10:10:59 PM· committed by GitHubparent5ea94e7
2 files changedLine totals unavailable