Open current file's directory

I've nuked my working Emacs environment for some known reason.

To get back some editing power, I set up a simple Vim environment.

As a result, I've always missed the capability to open the current
file's directory for exploring.

To do it in Vim: use netrw's Explore command series.

:Exp
:Lex
:Sex

etc.

Note, there's a fascinating abbreviation -- Sex-plore ;)