If you want your program to be readable, consider supplying the argument.

Help save the world!

In general, they do what you want, unless you want consistency.

Even if you aren't in doubt, consider the mental welfare of the person who has to maintain the code after you, and who will probably put parens in the wrong pl…

We toast the Lisp programmer who pens his thoughts within nests of parentheses.

I'm sure that that could be indented more readably, but I'm scared of the awk parser.

Though I'll admit readability suffers slightly...