anchor.diff:  mv(Source, Dest) ->
       case os:type() of
           {unix, _} ->
  -            {ok, []} = rebar_utils:sh(?FMT("mv \"~s\" \"~s\"", [Source, Dest]),
  +            EscSource = escape_spaces(Source),
  +            EscDest = escape_spaces(Dest),
  +            {ok, []} = rebar_utils:sh(?FMT("mv ~s ~s", [EscSource, EscDest]),
                                         [{use_stdout, false}, return_on_error]),
               ok;
           {win32, _} ->
  
positive.code: rm_rf(Target) ->
      case os:type() of
          {unix, _} ->
              EscTarget = re:replace(Target, " ", "\\\\ ",
                                     [global, {return, list}]),
              {ok, []} = rebar_utils:sh(?FMT("rm -rf ~s", [EscTarget]),
                                        [{use_stdout, false}, return_on_error]),
              ok;
  
negative.code: cp_r(Sources, Dest) ->
      case os:type() of
          {unix, _} ->
              EscSources = [escape_spaces(Src) || Src <- Sources],
              SourceStr = string:join(EscSources, " "),
              {ok, []} = rebar_utils:sh(?FMT("cp -R ~s \"~s\"",
                                             [SourceStr, Dest]),
                                        [{use_stdout, false}, return_on_error]),
  