fixing regex displaying as undefined in the pill (#5266)
fixing regex displaying as undefined in the pill (#5266)


timifasubaa/incubator-superset,apache/incubator-superset,airbnb/superset,timifasubaa/incubator-superset,airbnb/caravel,airbnb/superset,apache/incubator-superset,mistercrunch/panoramix,mistercrunch/panoramix,airbnb/superset,airbnb/superset,timifasubaa/incubator-superset,zhouyao1994/incubator-superset,airbnb/caravel,timifasubaa/incubator-superset,dmigo/incubator-superset,mistercrunch/panoramix,zhouyao1994/incubator-superset,airbnb/caravel,dmigo/incubator-superset,apache/incubator-superset,airbnb/caravel,zhouyao1994/incubator-superset,dmigo/incubator-superset,zhouyao1994/incubator-superset,apache/incubator-superset,dmigo/incubator-superset,apache/incubator-superset,mistercrunch/panoramix,zhouyao1994/incubator-superset