anchor.diff:  -spec option_spec_list() -> [getopt:option_spec()].
   option_spec_list() ->
       Commands = "Provide the path to the configuration file. "
  -               ++ "When none is provided elvis checks if there's "
  -               ++ "an elvis.config file.",
  +               "When none is provided elvis checks if there's "
  +               "an elvis.config file.",
       OutputFormat = "It allows you to display the results in plain text. When "
  -                   ++ "none is provided elvis displays the results in colors. "
  -                   ++ "The options allowed are (plain | colors).",
  -    KeepGoing = "Won't stop rocking on first error when given a list of files",
  +                   "none is provided elvis displays the results in colors. "
  +                   "The options allowed are (plain | colors).",
  +    KeepRocking = "Won't stop rocking on first error"
  +                  " when given a list of files",
       [
  -     {help, $h, "help", undefined, "Show this help information."},
  -     {config, $c, "config", string, Commands},
  -     {commands, undefined, "commands", undefined, "Show available commands."},
  -     {output_format, undefined, "output-format", string, OutputFormat},
  -     {version, $v, "version", undefined, "Specify the elvis current version."},
  -     {code_path, $p, "code-path", string, "Add the directory in the code path."},
  -     {keep_going, $k, "keep-going", undefined, KeepGoing}
  +     {help, $h, "help", undefined,
  +      "Show this help information."},
  +     {config, $c, "config", string,
  +      Commands},
  +     {commands, undefined, "commands", undefined,
  +      "Show available commands."},
  +     {output_format, undefined, "output-format", string,
  +      OutputFormat},
  +     {version, $v, "version", undefined,
  +      "Specify the elvis current version."},
  +     {code_path, $p, "code-path", string,
  +      "Add the directory in the code path."},
  +     {keep_rocking, $k, "keep-rocking", undefined,
  +      KeepRocking}
       ].
   
   -spec process_options([atom()], [string()]) -> ok.
  
positive.code: process_options([{output_format, Format} | Opts], Cmds, Config) ->
      ok = application:set_env(elvis, output_format, list_to_atom(Format)),
      process_options(Opts, Cmds, Config);
  process_options([keep_going | Opts], Cmds, Config) ->
      ok = application:set_env(elvis, keep_going, true),
      process_options(Opts, Cmds, Config);
  process_options([version | Opts], Cmds, Config) ->
      version(),
  
negative.code:     F = atom_to_list(FileName),
      case elvis_core:rock_this(F, Config) of
          {fail, _} ->
              case application:get_env(elvis, keep_rocking, false) of
                  false -> elvis_utils:erlang_halt(1);
                  true -> ok
              end;
  