Add failing test for directive returning when the return is implicit.

[groner]

    <testcase name="#171 ES2015: Directive return object (arrow function)">
      <failure>
          ---
            operator: equal
            expected: '// directive return objectmyMod.directive("foo", ["$scope", $scope =&gt; {    return {        controller: ["$scope", "$timeout", ($scope, $timeout) =&gt; {            bar;        }]    };}]);myMod.directive("foo", ["$scope", $scope =&gt; {    return {        controller: () =&gt; {            bar;        }    };}]);myMod.directive("foo", ["$scope", $scope =&gt; ({    controller: ["$scope", "$timeout", ($scope, $timeout) =&gt; {        bar;    }]})]);'
            actual: '// directive return objectmyMod.directive("foo", ["$scope", $scope =&gt; {    return {        controller: ["$scope", "$timeout", ($scope, $timeout) =&gt; {            bar;        }]    };}]);myMod.directive("foo", ["$scope", $scope =&gt; {    return {        controller: () =&gt; {            bar;        }    };}]);myMod.directive("foo", ["$scope", $scope =&gt; ({    controller: ($scope, $timeout) =&gt; {        bar;    }})]);'
            at: doTransform (/home/kai/src/babel-plugin-angularjs-annotate/tests/tests.js:84:5)
          ...
      </failure>
    </testcase>

[groner]

The test passes!

[schmod]

FWIW, this is not an implicit return, because bar is inside of a block-body ({ }).

[schmod]

Wait. Nevermind. We're looking at two different things. I do indeed see the implicit return on the line above 🤦‍♂️