This file exists!
next line intentionally blank

another line       spaces
%oddchars # & \foo
comment after%
\foo

$x'$
non-macro followed by 5 spaces     
macro followed by 5 spaces \foo     
macro \foo      followed by spaces
keyword = 1
fake spaces^^20^^20^^20
macro followed by fake spaces \foo^^20^^20^^20
fake cr^^M apparently looses remainder of line
face cr on next line
^^M
line { in brackets
still } continues
line with par \par inside.
\par par at beginning
line ended by par \par
last line.