Give occur mode the same bindings as wgrep.

[mijoharas]

I use wgrep fairly often, and always forget the keybindings now that I sometimes do multi replace in occur buffers. Give the same keybindings.

[sunlin7]

On vanilla emacs occur-edit-mode is bound to e (for "edit"), which is easy to understand than w (which implies "write"?)

[mijoharas]

True, I'd be fine with making wgrep do the same, and then me relearning muscle memory, but having both be different makes me always forget it (and my wgrep muscle memory is stronger.)

Essentially I just want consistency. Also, extra bindings that are mode specific are nice and discoverable.

(in vim mode in spacemacs i does the occur-edit-mode, but doesn't for wgrep)