Bug with the unindent command

[ianthehenry]

When you have a selection that spans multiple lines, and the first line that's selected consists only of the newline character at the end, the `unindent` command does not behave as expected.

I attached a screenshot of the selection that I'm describing. I would expect the `unindent` command to outdent these three lines, but what actually happens is that it outdents the first and third lines, but not the second.

This same selection works fine for the `indent` command, for some reason.

[jps]

Thanks for the report - will fix for the next build