Fix formating with go fmt

commands/sponge.go

@@ -16,7 +16,7 @@ import (
 )
 
 func Spongify(input_message string) string {
-    spongified_message := ""
+	spongified_message := ""
 	for i, char := range input_message {
 		if i%2 == 0 {
 			spongified_message += strings.ToLower(string(char))
@@ -24,7 +24,7 @@ func Spongify(input_message string) string {
 			spongified_message += strings.ToUpper(string(char))
 		}
 	}
-    return spongified_message
+	return spongified_message
 }
 
 func Sponge(m *tb.Message) {