Leading parens incorrectly removed from some case statements

[sdball]

The following bash is valid in bash 3.2+

_script_dir="$(
	_program="$0"
	case "$_program" in
	(*/*) ;;
	(*) _program=$(command -v -- "$0") ;;
	esac
	[[ -L "$_program" ]] && _program=$(readlink "$_program")
	cd -P -- "$(dirname -- "$_program")" && pwd -P
)"

But shfmt removes the leading parens on the cases which works in bash 4+ but not bash 3

_script_dir="$(
	_program="$0"
	case "$_program" in
	*/*) ;;
	*) _program=$(command -v -- "$0") ;;
	esac
	[[ -L "$_program" ]] && _program=$(readlink "$_program")
	cd -P -- "$(dirname -- "$_program")" && pwd -P
)"

[mvdan]

See the first half of #779, which reported the same issue. In short, this is a consistent formatting choice, and it feels too small and uninteresting to warrant yet another formatting option of its own :)

[sdball]

Oh thanks for pointing me to the issue. I searched but missed that one.

I agree it's very much an edge, but it means I can't use shfmt on a script that I'd like to continue to work with Bash 3.2.

With the leading parens removed bash 3.2 points to the */*) as invalid

command substitution: syntax error near unexpected token `newline'

I really love shfmt, I think I'll see about rewriting this (admittedly weird) snippet to avoid the issue.