Suggestion: flatten map if there is only one binding under the prefix

[xu-cheng]

Instead of showing:

After pressing Leader

[a] 
...

Then press a

[b] SomeCommand

---

Show this directly:

After pressing Leader

[ab] SomeCommand
...

[hecal3]

I was working on this the other day, after testing out vim-gita. Many of its mappings consist of the same key twice (<< for stage, >> for unstage, -- for toggle, and so on).

I don't think it is actually flattening you are after but rather skipping a level in the mapping tree. I believe there is a slight difference that comes into play when there is a third level of mappings.

In your example:
[b] is not a mapping but a group.

With flattening the top level shows:
[aba] SomeSubCommandA
[abb] SomeSubCommandB

With skipping it is:
[ab] GroupNameB

Anyway, its on the todo list.