anchor.diff:  
   -spec init(rebar_state:t()) -> {ok, rebar_state:t()}.
   init(State) ->
  -    State1 = rebar_state:add_provider(State, providers:create([{name, ?PROVIDER},
  -                                                               {module, ?MODULE},
  -                                                               {bare, true},
  -                                                               {deps, ?DEPS},
  -                                                               {example, "rebar3 deps"},
  -                                                               {short_desc, "List dependencies"},
  -                                                               {desc, info("List dependencies")},
  -                                                               {opts, []}])),
  +    State1 = rebar_state:add_provider(
  +            State,
  +            providers:create([
  +                    {name, ?PROVIDER},
  +                    {module, ?MODULE},
  +                    {bare, true},
  +                    {deps, ?DEPS},
  +                    {example, "rebar3 deps"},
  +                    {short_desc, "List dependencies"},
  +                    {desc, "List dependencies. Those not matching lock files "
  +                           "are followed by an asterisk (*)."},
  +                    {opts, []}])),
       {ok, State1}.
   
   -spec do(rebar_state:t()) -> {ok, rebar_state:t()} | {error, string()}.
  
positive.code:     display_deps(State, Deps),
      ?CONSOLE("", []).
  
  merge(Deps, Deps) ->
      Deps;
  merge(Deps, SourceDeps) ->
      ToAdd = [Dep || Dep <- SourceDeps,
                      not lists:keymember(ec_cnv:to_binary(element(1,Dep)), 1, Deps)],
      Deps ++ ToAdd.
  
  display_deps(State, Deps) ->
      lists:foreach(fun(Dep) -> display_dep(State, Dep) end, Deps).
  
negative.code: %% packages
  display_dep(_State, {Name, Vsn}) when is_list(Vsn) ->
      ?CONSOLE("~s* (package ~s)", [ec_cnv:to_binary(Name), ec_cnv:to_binary(Vsn)]);
  display_dep(_State, Name) when is_binary(Name) ->
      ?CONSOLE("~s* (package)", [Name]);
  %% git source
  display_dep(_State, {Name, Source}) when is_tuple(Source), element(1, Source) =:= git ->
      ?CONSOLE("~s* (git source)", [ec_cnv:to_binary(Name)]);
  