CppEditor: Whitespace fix in test

Change-Id: Ia34c661364acda585c286bc1ef756b3554630657
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
CppEditor: Add a failing test for virtual overrides

When function has a different return type

Change-Id: I1178e7e2c6b7e074a3737aaef597ebeff8d776dc
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>