Fix block comment in Makefile

[tancnle]

Closes #2301

[jneen]

Is this supported? idk if i've ever seen it before, usually it's just indented with the block and it's a shell comment.

[tancnle]

@jneen It seems supported.

Tested with the following Makefile.test

$ cat /tmp/Makefile.test
on:
# Start environment
	# Start environment (indented)
	echo "on"

off:
# Stop environment
	# Stop environment (indented)
	echo "off"

$ make on -f /tmp/Makefile.test
# Start environment (indented)
echo "on"
on

Indented comment does not work. It is printed in shell comment in the output

[jneen]

Alright, I think the only other thing is /#.*\n?/ may be a better regex here. Greedy is generally okay in this case because . doesn't match newline without /m, and the comment may appear at EOF without a newline.

[tancnle]

Thanks, @jneen. That sounds good to me 👍🏼