Compacted code

src/snek/static/chat-input.js

@@ -67,13 +67,7 @@ class ChatInputComponent extends HTMLElement {
   }
 
   getAuthors() {
-    let authors = []
-    for (let i = 0; i < this.users.length; i++) {
-      authors.push(this.users[i].username)
-      authors.push(this.users[i].nick)
-    }
-    return authors
-
+    return this.users.flatMap((user) => [user.username, user.nick])
   }
 
   extractMentions(text) {