Just an fyi someone else told me this to use on my posts and it makes them look better:

<div class="text-justify">
Your post
</div>

This justifies your entire post and that keeps the end of the lines at the same place. The only thing you need to watch is write that code on a line then return down leaving a full line between it and the start of your post and a full line after your post before the closing tag. Otherwise sometimes it won't display correctly.