src/vs/base/common/keybindingParser.ts/KeybindingParser/parseSimpleUserBinding
class KeybindingParser:	private static parseSimpleUserBinding(input: string): [SimpleKeybinding | ScanCodeBinding, string] {
		const mods = this._readModifiers(input);
		const scanCodeMatch = mods.key.match(/^\[([^\]]+)\]$/);
		if (scanCodeMatch) {
			const strScanCode = scanCodeMatch[1];
			const scanCode = ScanCodeUtils.lowerCaseToEnum(strScanCode);
			return [new ScanCodeBinding(mods.ctrl, mods.shift, mods.alt, mods.meta, scanCode), mods.remains];
		}
		const keyCode = KeyCodeUtils.fromUserSettings(mods.key);
		return [new SimpleKeybinding(mods.ctrl, mods.shift, mods.alt, mods.meta, keyCode), mods.remains];
	}