BUGFIX: Was adding 2 Datastore columns

cmd/list.go

@@ -292,8 +292,9 @@ func listJailsFromDirectory(dir string, dsname string) ([]Jail, error) {
 					/*fmt.Printf("Warning: A jail with name %s exist on datastore %s, use full name to interact!\n", j.Name, jj.Datastore)
 					fmt.Printf("(Ex: gocage start %s/%s)\n", jj.Datastore, j.Name)*/
 					// Add Datastore  to avoid confusion
-					gDisplayJColumns += ",Datastore"
-					gDisplaySColumns += ",Datastore"
+					if false == strings.Contains(gDisplayJColumns, "Datastore") {
+						gDisplayJColumns += ",Datastore"
+					}
 				}
 			}