Qualify Itertools::intersperse to fix warning

src/cri.rs

@@ -145,13 +145,13 @@ impl Cri {
     }
 
     fn handle_quit_command(&self, tokens: &mut SplitWhitespace<'_>) {
-        let reason: String = tokens.intersperse(" ").collect();
+        let reason: String = Itertools::intersperse(tokens, " ").collect();
         let reason = if reason.trim().is_empty() {
             None
         } else {
             Some(reason)
         };
-        
+
         self.input_tx
             .borrow()
             .send(IrcCommand::QUIT(reason).into())