Problem: Ranges for arguments, buffers, tabs, etc. are not checked to
be valid but limited to the maximum. This can cause the
wrong
thing to happen.
Solution: Give an error for an invalid value. (Marcin Szamotulski)
Use windows range for ":wincmd".
https://code.google.com/p/vim/source/detail?r=v7-4-565
Problem: Using a range for window and buffer commands has a few
problems.
Cannot specify the type of range for a user command.
Solution: Add the -addr argument for user commands. Fix problems.
(Marcin Szamotulski
https://code.google.com/p/vim/source/detail?name=v7-4-542