Do completion on one <tab> press, not two
Look for bash completion script in two places

First at /etc/bash_completion, then in
/etc/profile.d/bash_completion.sh.
Add a note about the gs alias

It hides GhostScript program.
Better auto completion for the showman command
Add vi-like shorthands for the man command

h
With proper completion.
Add q command as a synonym for :q (which is exit)
Add e alias as a synonym for v alias
Highlight prompt in the shell
A better approach to determine parent processes
Add gh alias for git

Shows information about git object.
Add ghs alias for git

Shows information about git object with some statistic.