Regression: Editor adds second closing brace to class, creating syntax error

1. Have a minimal class in your code:

   class C {
   };
   

2. Place the cursor behind the opening brace and press Enter key.

   class C {
   
   };
   

3. Select all characters from the current cursor position up to, but not including, the opening brace.
4. Press backspace.

   class C {
   };
   

5. Press Enter.
   Creator will add another closing brace and a semicolon, making the code syntactically wrong:

   class C {
       
   };
   };
   

Code completion should not introduce syntax errors. In this case, just a new line should be added.

This is a regression, it used to work correctly in Creator 3.0