anchor.diff:        "    -strbin~n"
         "          Specify that decoded strings should be returend as binaries,~n"
         "          instead of as strings (lists).~n"
  +      "    -il~n"
  +      "          Generate code that includes gpb.hrl using -include_lib~n"
  +      "          instad of -include, which is the default.~n"
         "    --help  -h~n"
         "          Show help~n"
         "    --version  -V~n"
  
positive.code:                                         error     -> false
                                      end;
  parse_opt({"strbin", []})        -> {true, strings_as_binaries};
  parse_opt({"h", _})              -> {true, help};
  parse_opt({"-help", _})          -> {true, help};
  parse_opt({"V", _})              -> {true, version};
  
negative.code: %%   <dt>`-strbin'</dt>
  %%   <dd>Specify that decoded strings should be returend as binaries,
  %%       instead of as strings (lists).</dd>
  %%   <dt>`-il'</dt>
  %%   <dd>Generate code that include gpb.hrl using `-include_lib'
  %%       instad of `-include', which is the default.</dd>
  %%   <dt>`--help' or `-h'</dt>
  %%   <dd>Show help.</dd>
  %%   <dt>`--version' or `-V'</dt>
  