Last line should be justified when text is justified #3
Description
When text is justified, the expected behaviour of balance is to make all lines be the same width, with the least amount of extra spacing. Right now, the last line can be shorter than the others.
The current workaround is to use balance[some text#linebreak(justify: true)]
Commit d1769d1 accomplished this when the content to be balanced is simple text, but broke things (and didn't fix the problem) when balancing arbitrary content, so commit c216c0 reverted these changes.