Go fmt and add missing toml:"hmc" tag

main.go

@@ -44,7 +44,7 @@ type Config struct {
 		ApiUrl       string `toml:"api_url"`
 		SharedSecret string `toml:"shared_secret"`
 		City         string `toml:"city"`
-    }
+	} `toml:"hmc"`
 	Postmark struct {
 		ServerToken   string `toml:"server_token"`
 		ApiUrl        string `toml:"api_url"`
@@ -469,7 +469,7 @@ func main() {
 			maxIndexWidth := len(strconv.Itoa(len(subscribers)))
 			for index, email := range subscribers {
 				indexStr := strconv.Itoa(index + 1)
-                indexStr = strings.Repeat(" ", maxIndexWidth - len(indexStr)) + indexStr // Right-align the index
+				indexStr = strings.Repeat(" ", maxIndexWidth-len(indexStr)) + indexStr // Right-align the index
 				fmt.Printf("%s. \033[1m%s\033[0m\n", indexStr, email)
 			}
 			fmt.Printf("\nMailing list grows automatically as more subscribe at \033[1mhandmadecities.com/meetups\033[0m\n")