Improve the resulting URL output from rbt post.
The new change to display the diff URL was a nice addition, but

displaying both URLs staggered on consecutive lines felt a little hard

to read.
This aligns the URLs to help with the readability. It also adds a blank

line between and after, which helps separate the results from each other

and the prompt (something that's bothered me for a while). This makes it

easier to click the links without clicking the wrong thing.

Posted this diff and saw:
Review request #5458 posted.

Review request: https://reviews.reviewboard.org/r/5458/

          Diff: https://reviews.reviewboard.org/r/5458/diff/