syntax: comments aren't spaced when following parentheses

[mvdan]

Discussed in #838

^{Originally posted by antichris April 3, 2022}
Is there a specific design reason why the space preceding a comment is removed when it follows an open parenthesis, or is it by accident?

Given the input

#!/bin/sh

foo() { ## (bar, [baz])
	:
} ## qux

corge() ( ## (grault, [garply])
	:
) ## waldo

_=$( ## lorem ipsum
	:
) ## dolor sit amet

shfmt yields

#!/bin/sh

foo() { ## (bar, [baz])
        :
} ## qux

corge() (## (grault, [garply])
        :
) ## waldo

_=$(## lorem ipsum
        :
) ## dolor sit amet