
   Troff hello world
  ===================

  
          left margin                              right margin
          │                                                   │
          hello world hello world hello world hello world hello├─ end of
   back ─┤world hello world hello world hello world hello world   line
  to the  hello world hello world hello world hello world hello
  margin  world hello world hello world hello world hello world
          hello world hello world hello world hello world hello
          world hello world hello world hello world hello world
          hello world hello world hello world hello world hello
          world hello world hello world hello world
                                                   │
                                                  the cursor is
                                                  now here
  
