anchor.diff:  %%
   %% Generate the contents of a simple .app file
   %%
  -app(Name) ->
  +app(Name, Modules) ->
       App = {application, Name,
              [{description, atom_to_list(Name)},
               {vsn, "1"},
  -            {modules, []},
  +            {modules, Modules},
               {registered, []},
               {applications, [kernel, stdlib]}]},
       io_lib:format("~p.\n", [App]).
  
positive.code: files() ->
      [
       %% A1 application
       {create, "apps/a1/ebin/a1.app", app(a1)},
       {copy, "a.rebar.config", "apps/a1/rebar.config"},
       {template, "a.erl", "apps/a1/src/a1.erl", dict:from_list([{module, a1}])},
  
       %% A2 application
       {create, "apps/a2/ebin/a2.app", app(a2)},
       {copy, "a.rebar.config", "apps/a2/rebar.config"},
       {template, "a.erl", "apps/a2/src/a2.erl", dict:from_list([{module, a2}])},
  
  
negative.code:      {copy, "../../rebar", "rebar"},
  
       %% B application
       {create, "repo/b/ebin/b.app", app(b, [])},
       {copy, "b.rebar.config", "repo/b/rebar.config"},
       {copy, "b.hrl", "repo/b/include/b.hrl"},
  
       %% C application
       {create, "repo/c/ebin/c.app", app(c, [])},
       {copy, "c.hrl", "repo/c/include/c.hrl"}
      ].
  
  