The rbt info command has been added to show detailed information about

a review request, including its summary, description, and commit

information.

Ran rbt info in the following conditions:

The review request was attachments-only.
No diffset revision was provided.
The requested diffset revision did not exist.
The requested diffset revision did exist.
The review request was created without commit history support.
The review request was created with commit history support.