Colon prefixing

In some commands (like PRIVMSG, TOPIC, USER, NOTICE, etc), the client needs to add a colon before the content (NOT after the command)

❌ Your client shouldn't do this:

↗️ PRIVMSG foo this is a very cool message
🔀 nick!ident@host PRIVMSG foo :this

✅ Here's what it should do:

↗️ PRIVMSG foo :this is a very cool message
🔀 nick!ident@host PRIVMSG foo :this is a very cool message