SYNOPSIS

# 4 spaces
# should come out the same

TABS

These tabs
can be left alone

3 SPACES

3 spaces should be converted to 4.
Here, too

And also

here.

MIXED (You don't really want to do that, though, do you?)

Mixed paragraphs should all get the same indentation added to preserve the formatting:

    4 spaces (+ 2 = 6)
	a tab
   3 spaces (+ 2 = 5)
  2 spaces (+ 2 = 4) (the minimum)

5 spaces

Because you can
if you want to

1 space

a little short, but valid

THAT'S ENOUGH