Test multi-line sub attribute handling.

Test the changes to allow multi-line sub attributes on handlers, and
that normal ones (with and without a value) continue to work as
expected.

Author: bigpresh

t/aggregate/live_component_controller_action_action.t

@@ -190,6 +190,14 @@ sub run_tests {
         my $action = eval $response->content;
         is_deeply $action->attributes->{extra_attribute}, [13];
         is_deeply $action->attributes->{another_extra_attribute}, ['foo'];
+
+        # Test a multi-line attribute on the action comes through as expected
+        is_deeply $action->attributes->{MultiLineAttr}, ["one\ntwo\nthree"];
+        # and a normal one e.g. `Foo('bar')`
+        is_deeply $action->attributes->{Foo}, ['bar'];
+        # and one without a value, e.g. `Baz` - note that the presence of
+        # the arrayref shows it was there
+        is_deeply $action->attributes->{Baz}, [undef];
     }
     {
         ok( my $response = request('http://localhost/action_action_nine'),

t/lib/TestApp/Controller/Action/Action.pm

@@ -53,7 +53,11 @@ sub action_action_seven : Global : ActionClass('~TestExtraArgsAction') {
     $c->forward('TestApp::View::Dump::Request');
 }
 
-sub action_action_eight : Global  {
+sub action_action_eight : Global Foo('bar') MultiLineAttr(
+    one
+    two
+    three
+) Baz {
     my ( $self, $c ) = @_;
     $c->forward('TestApp::View::Dump::Action');
 }
@@ -62,4 +66,5 @@ sub action_action_nine : Global : ActionClass('~TestActionArgsFromConstructor')
     my ( $self, $c ) = @_;
     $c->forward('TestApp::View::Dump::Request');
 }
+
 1;