   100
        -
   101
        --
   102
        ---
   103   x
        - --
   104  shift
   105  esc9
   106  esc8
   107  esc
   108  esc6
   109  backspace
   110  tab     tab
   111  abc  efg
           -    -
   112  |---|
   113  | x |
   114  |   |
         ---
   115  line longer than 132 characters line longer than 132 characters line longer than 132 characters line longer than 132 ch01234
            -      -    -   -          -    -      -    -   -          -    -      -    -   -          -    -      -    -   -
   116  nulls
   117  next line ascii 0 - 127
   118
   119
                                                                        -
   200
        ---
   201  abc
   202   abc
        -
   203  a bc
         -
   204  ab c
          -
   205  abc
           -
   206    abc
        --
   207  a  bc
         --
   208  ab  c
          --
   209  abc
           --
   210   a bc
        - -
   211   ab c
        -  -
   212  a b c
         - -
   213  a  bc
         --
   214  a bc
         -  -
   215  abc
           --
   216   abc
        -   -
   217   a b c
        - - -
   218   a  bc
        - --
   219  a  bc
         --  -
   220   abc
        -   --
   221     abc
        ---
   222  abc
           ---
return value: 0