Don't add newline with every use statement

[jordyvandomselaar]

Whenever I let Serenata automatically import a class it inserts a newline as well:

[Gert-dev]

It groups siilar use statements (or should, at least) together and splits the groups with newlines.

If you don't want this, you can track #376 as well as this core issue.

If you do want this, you can you can also try the "sort use statements" command to sort existing use statements.