# Objective
Case conversion commands deleted the newline at the end of the
selection,
merging the selected line into the line below it.

To reproduce:

1. A buffer with two lines:

   ```
   hello world
   goodbye
   ```

2. Put the cursor on line 1 and run `editor: select line` — this selects
   `hello world\n`, newline included.
3. Run `editor: convert to upper camel case`.

Before: `HelloWorldgoodbye`, one line. After: `HelloWorld` / `goodbye`.

## Testing

Added a regression test to `test_manipulate_text`.


Release Notes:
- Fixed the case conversion commands deleting the line break when the
selection
  ended at the start of the next line.