(Re)map prefixes

[KenjiTakahashi]

I'd like to be able to do

map ; :

since it's mapped like this in ranger and I'm too used to not having to press Shift :-).
Personally, I'm fine with just hardcoding ; as alias for :, but maybe a more generic solution would be nice?

[gokcehan]

You can map it by mapping the read command as such:

map ; read

When I tried it now, I thought it wasn't going to work since ; is used as the statement separator but it seems to work somehow, kind of accidental though :)

At some point I will clean the parser code. I will try to remember not to break this behaviour but if something changes you can reopen this issue.