These next three sections should be spaced identical: there should be
a blank line before the preformatted text and a blank line after the
pre-formatted text, but no other blank lines.
BeforePreformatted text, no newlines inside
After
Before
Preformatted text, one newline after open-pre tag
After
Before
Preformatted text, one newline after open-pre tag and before close tag
After
Make sure newlines are preserved: one
Make sure newlines are preserved: two
Make sure newlines are preserved: three
End of this section
These next set of lines should be lined up neatly
x       x       x       x       x       x       x       x       x       end
X	X	X	X	X	X	X	X	X	end
X	x       X	x       x       X	X	x       x       end
Make sure whitespace is preserved:
     Five blanks
    Four blanks
   Three blanks
  Two blanks
 Blank
None!