(interactive "PD") was incorrectly used to pass two interactive
arguments to the command, but only the first argument was sent.
This corrects that, refactors +tmux/cd to be easier to understand, and
updates its docstring to reflect these changes.
Specifying a session and / or window to +tmux-list-windows
and +tmux-list-panes just failed, because of the special characters
used in the ids for sessions & windows ($ and @). Quoting the ids
before building up the tmux command fixes this.
+ enable lexical-scope everywhere (lexical-binding = t): ~5-10% faster
startup; ~5-20% general boost
+ reduce consing, function calls & garbage collection by preferring
cl-loop & dolist over lambda closures (for mapc[ar], add-hook, and
various cl-lib filter/map/reduce functions) -- where possible
+ prefer functions with dedicated opcodes, like assq (see byte-defop's
in bytecomp.el for more)
+ prefer pcase & cond (faster) over cl-case
+ general refactor for code readability
+ ensure naming & style conventions are adhered to
+ appease byte-compiler by marking unused variables with underscore
+ defer minor mode activation to after-init, emacs-startup or
window-setup hooks; a customization opportunity for users + ensures
custom functionality won't interfere with startup.
