the (--foo)--foo is harmless but redundant and makes things hard to
read, we only need that syntax when we want to prevent an option being
completed together with *another* option, such as the instance with
(-t --token){-t,--token} where _arguments doesn't know those do the same
thing.
Many movings of local inside the actual functions.
Add many missing local and remove -g(!).
Fix namespacing of some parameters and functions, phases() in _scala was nice.
Mikael Magnusson