Styling of aliases

[wabiloo]

I would like to be able to style the aliases differently, in particular in the list of commands appearing in a group.

Currently, aliases appear in brackets behind the main command name, and in the same color.
When there are several, and long ones, it is not hugely readable.

I would like to at least be able to choose a different color for them

[janluke]

You need to override format_subcommand_aliases to fully customize how aliases are formatted. For colours, please check out the following PR (feedback appreciated):

• Feature: theming support for list of subcommand aliases #152