topics properly spaced for series

config.json

       "slug": "series",
       "topics": [
         "loops",
-		    "strings",
-		    "conditionals"
+	"strings",
+	"conditionals"
       ],
       "unlocked_by": "hamming",
       "uuid": "af80d7f4-c7d0-4d0b-9c30-09da120f6bb9"