Problem
Currently cargo has bash completion for most (if not all) builtin commands such as build, run, check etc.
However, it doesn't have bash completion for the short forms of these commands, such as b, r, c etc.

Steps

1. In bash, type cargo build <tab>. Some completions should appear.
2. Now type cargo b <tab>. This time no completions appear.

Possible Solution(s)
I expect the exact same completions to appear also for command shorthands.