bug#28215: 26.0.50; Option-Clover-H

[Devon Sean McCullough <Emacs-Hacker2017@jovi.net>]

> On Aug 25, 2017, at 4:24 AM, Alan Third <alan@idiocy.org> wrote:
> 
> On Thu, Aug 24, 2017 at 08:34:47PM +0100, Alan Third wrote:
>> It looks like the problem is at nsterm.m:6122. I don’t understand what
>> the point of that code is. It looks like it’s trying to work around
>> some problem with different keyboard layouts.
> 
> Attached is a patch that adds the M-s-h shortcut, and removes the code
> that treats the super key as special.
> 
> If anyone can tell me why that code was there that would be great, but
> it seems to work fine without it. It’s been there since the NS port
> was merged into GNU Emacs, so I wonder if it’s required on some old
> *step implementation.

Could it be trying to support
Apple > System Preferences... > Keyboard > Input Sources > + > English > DQ Dvorak - Qwerty ⌘
which IIRC is a Dvorak layout but with Qwerty Command-keychords
already ingrained in Mac users' muscle memory?

	Peace
		—Devon

P.S. DV Dvorak layout vs. DQ Dvorak - Qwerty ⌘ layout
     Apple key labels -> Emacs 26.0.50 events

	Dvorak	Qwerty	DV	DQ
	H	J	h	h
	D	H	d	d
	⌘H	⌘J	s-h	s-j
	⇧⌘H	⇧⌘J	s-H	s-H
	⌥⌘H	⌥⌘J	M-s-˙	M-s-∆
	⌘D	⌘H	s-d	s-h
	⇧⌘D	⇧⌘H	s-D	s-D
	⌥⌘D	⌥⌘H	M-s-∂	M-s-˙

    Special characters in all layouts per Keyboard Viewer or (setq ns-option-modifier 'none)
	Key Chord	Character	Unicode Name
	Option-D	∂       	PARTIAL DIFFERENTIAL
	Option-H	˙       	DOT ABOVE 
	Option-J	∆       	INCREMENT

P.P.S. /System/Library/Input Methods/KeyboardViewer.app shows keyboard layout, tracking input source & bucky bit state
in real time.  Turns out there are eight different Option layouts, one for each Control/Shift/Command combination.
Perhaps C-q quoted-insert should access these MacOSX alternate layouts by binding ns-option-modifier to none for NS,
similarly current-input-mode/set-input-mode for tty input and finally insert the next input key sans bucky bits.