src/vs/editor/common/config/fontInfo.ts/BareFontInfo/getMassagedFontFamily
class BareFontInfo:	public getMassagedFontFamily(): string {
		const fallbackFontFamily = EDITOR_FONT_DEFAULTS.fontFamily;
		const fontFamily = BareFontInfo._wrapInQuotes(this.fontFamily);
		if (fallbackFontFamily && this.fontFamily !== fallbackFontFamily) {
			return `${fontFamily}, ${fallbackFontFamily}`;
		}
		return fontFamily;
	}