Incorrect JSON escaping of rules regex

[mickaelperrin]

I just noticed that rules like:

JB_Apps='^(PyCharm|PhpStorm)$'
yabai -m rule --add app="${JB_Apps}" title=".*\[.*\].*" manage=on display=$CENTRAL_MONITOR # Generic main windows

produces an incorrect JSON and jq fails with:

yabai -m rule --list | jq
jq: parse error: Invalid escape at line 24, column 21

{
	"index":1,
	"label":"",
	"app":"^(PyCharm|PhpStorm)$",
	"title":".*\[.*\].*",
	"role":"",
	"subrole":"",
	"display":1,
	"space":0,
	"follow_space":false,
	"opacity":0.0000,
	"manage":true,
	"sticky":null,
	"mouse_follows_focus":null,
	"sub-layer":"",
	"native-fullscreen":null,
	"grid":"0:0:0:0:0:0",
	"one-shot":false,
	"flags":"0x00000003"
}