Completion should group by common prefix

[jonnyzzz]

In my case, I have about 80 sub projects in folders

`./gradlew :src:' + complete

I expect is to list projects first and after that the actual :src: project tasks.

Currently, it shown like there are thousands of items, next the whole set is shown.
Also, it may play nice if I were able to select an item with TAB in the same way as it works for ZSH/oh-my-zsh

[eriwen]

Good ideas @jonnyzzz. I've wanted this and haven't quite figured out the best way to support it yet.

I've filed #38 for your 2nd request.

[eriwen]

I think we can provide this feature in ZSH using the _sep_parts completion function.

[wosiu]

+1 for bash! I can give a try. Advices appreciated :)

[wosiu]

Here's a solution for bash: #86
Please let me know wdyt.