anchor.diff:      ok.
   
   %% @doc Build the PLT.
  -%% @spec build-plt(Config::#config{}, File::string()) -> ok
  +%% @spec 'build-plt'(Config::#config{}, File::string()) -> ok
   -spec 'build-plt'(Config::#config{}, File::string()) -> ok.
   'build-plt'(Config, File) ->
       Plt = new_plt_path(Config, File),
  
positive.code:     ok.
  
  %% @doc Check whether the PLT is up-to-date (rebuilding it if not).
  %% @spec check-plt(Config::#config{}, File::string()) -> ok
  -spec 'check-plt'(Config::#config{}, File::string()) -> ok.
  'check-plt'(Config, File) ->
      Plt = existing_plt_path(Config, File),
  
negative.code: 
  %% @doc If the warnings option is present in rebar.config return its value,
  %% otherwise return [].
  %% @spec warnings(Config::#config{}) -> list()
  -spec warnings(Config::#config{}) -> list().
  warnings(Config) ->
      DialyzerOpts = rebar_config:get(Config, dialyzer_opts, []),
  