Created attachment 164853 [details]
a sample js demo snippet

SUMMARY
E.g. in the following JS snippet
```
  if (true) {
  |}
```

where the cursor position is marked with |, pressing the ENTER key adds and extra empty line:
```
  if (true) {
  
    
  }
```

STEPS TO REPRODUCE
0. open Kate
1.  Disable enclosing chars
2. Open the attached JS file
3. move your text cursor to the same line as "}" but to the left of the }
4. Press ENTER once

OBSERVED RESULT
that two blank lines were added

EXPECTED RESULT
only one blank like added


SOFTWARE/OS VERSIONS
Windows: 
macOS: ✓
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version:   5.112.0
Qt Version: 5.15.10 (built against 5.15.10)

ADDITIONAL INFORMATION
This could also be a problem with indentation as I only observed this issue on language - specific files.