[make:entity] `generate()` call to `is_string()` appears to always evaluate to `false`

[jrushlow]

https://github.com/symfony/maker-bundle/blob/f7ee2503fbea634f2e8c30170a8ad8bd0e3d378f/src/Maker/MakeEntity.php#L309

I believe $manipulatorOrMessage is always an instance of ClassSourceManipulator but I may be wrong. This could be an artifact leftover from previous versions where we did display a message. We need to confirm what use case would cause this not to be an instance of CSM.

For debugging:

• change the conditional to $manipulatorOrMessage instanceOf ClassSourceManipulator -> getSourceCode() && exit early.
• then attach breakpoint || dump($manipulatorOrMessage) in the else statement.

[RazielRodrigues]

Hello @jrushlow I can work on this if nobody started :D