- If the second address is empty, it is assumed to be `.`
- Regex addresses and `:substitute` now integrate with search history and
respect case sensitivity settings
- Patterns for `:substitute` can't be delimited by
- `:set` now supports inverting options using `:set inv{option}` and
`:set {option}!`
- New commands: `:new`, `:vnew`, `:exit`, `:xall`, `:wall`, `:qall`, `:update`
`:tabedit` now works as an alias to `:edit` with a path and
as an alias to `:tabnew` without.
`:tabnew` is a new command that opens a new tab with a new file if used
without a path and works as an alias to `:tabedit` with one.
`:tabclose` now works as a proper alias to `:quit` (i.e. passes the arguments)
`:edit` now works more like before - it opens a given path in a new tab.
It also doesn't do anything if the file was modified since the last commit,
unless forced by using `:edit!`
`:write` works properly again and doesn't overwrite files, unless forced by
using `:write!`
`:xit` is now called `:xit` and not just `:x`
`:substitute` now properly replaces multiple groups (`:s/(a)b(c)/X\1\2X\0`)
