Trim message before processing

main.js

@@ -142,7 +142,7 @@ client.on("message", m => {
     if (m.mentions.users.first().id == client.user.id) {
         let content = m.cleanContent
             .substring(`@${client.user.username} `.length);
-        let lowerCaseContent = content.toLowerCase();
+        let lowerCaseContent = content.toLowerCase().trim();
         for (let c in commands) {
             if (lowerCaseContent.startsWith(c)) {
                 commands[c](m, content);