tests: Added formatting test for leaving empty line when removing empty comment(s)

Signed-off-by: Ole Herman Schumacher Elgesem <ole@northern.tech>

Author: olehermanse

tests/format/005_bundle_comments.expected.cf

@@ -47,3 +47,8 @@ bundle agent f(s, d, o, p)
   reports:
     "Hello, world!";
 }
+
+bundle agent g
+{
+  # comment
+}

tests/format/005_bundle_comments.input.cf

@@ -45,3 +45,8 @@ bundle agent f(
   reports:
     "Hello, world!";
 }
+#
+bundle agent g
+{
+  # comment
+}