Change tags info format

cli/device/list.go

@@ -84,7 +84,7 @@ func (r listResult) String() string {
 			device.Board,
 			device.FQBN,
 			device.Serial,
-			strings.Join(device.Tags, ", "),
+			strings.Join(device.Tags, ","),
 		)
 	}
 	return t.Render()

cli/thing/list.go

@@ -101,7 +101,7 @@ func (r result) String() string {
 
 	for _, thing := range r.things {
 		r := []interface{}{thing.Name, thing.ID, thing.DeviceID}
-		r = append(r, strings.Join(thing.Tags, ", "))
+		r = append(r, strings.Join(thing.Tags, ","))
 		if listFlags.variables {
 			r = append(r, strings.Join(thing.Variables, ", "))
 		}

command/tag/tag.go

@@ -28,7 +28,7 @@ func TagsInfo(tags map[string]interface{}) ([]string, error) {
 		if !ok {
 			return nil, fmt.Errorf("value of tag `%s` should be of type `string` but is of type `%T`", key, value)
 		}
-		str = append(str, key+": "+valStr)
+		str = append(str, key+"="+valStr)
 	}
 	return str, nil
 }