1 files changed, 6 insertions, 6 deletions

diff --git a/components/devtools/actor.rs b/components/devtools/actor.rs
index 54b59bc8d79..178b840ebce 100644
--- a/components/devtools/actor.rs
+++ b/components/devtools/actor.rs
@@ -85,7 +85,7 @@ impl ActorRegistry {
     }
 
     pub fn register_script_actor(&self, script_id: String, actor: String) {
-        println!("registering {:s} ({:s})", actor.as_slice(), script_id.as_slice());
+        println!("registering {} ({})", actor.as_slice(), script_id.as_slice());
         let mut script_actors = self.script_actors.borrow_mut();
         script_actors.insert(script_id, actor);
     }
@@ -103,19 +103,19 @@ impl ActorRegistry {
 
     pub fn actor_to_script(&self, actor: String) -> String {
         for (key, value) in self.script_actors.borrow().iter() {
-            println!("checking {:s}", value.as_slice());
+            println!("checking {}", value.as_slice());
             if value.as_slice() == actor.as_slice() {
                 return key.to_string();
             }
         }
-        panic!("couldn't find actor named {:s}", actor)
+        panic!("couldn't find actor named {}", actor)
     }
 
     /// Create a unique name based on a monotonically increasing suffix
     pub fn new_name(&self, prefix: &str) -> String {
         let suffix = self.next.get();
         self.next.set(suffix + 1);
-        format!("{:s}{:u}", prefix, suffix)
+        format!("{}{}", prefix, suffix)
     }
 
     /// Add an actor to the registry of known actors that can receive messages.
@@ -154,11 +154,11 @@ impl ActorRegistry {
                           -> Result<(), ()> {
         let to = msg.get(&"to".to_string()).unwrap().as_string().unwrap();
         match self.actors.get(&to.to_string()) {
-            None => println!("message received for unknown actor \"{:s}\"", to),
+            None => println!("message received for unknown actor \"{}\"", to),
             Some(actor) => {
                 let msg_type = msg.get(&"type".to_string()).unwrap().as_string().unwrap();
                 if !try!(actor.handle_message(self, &msg_type.to_string(), msg, stream)) {
-                    println!("unexpected message type \"{:s}\" found for actor \"{:s}\"",
+                    println!("unexpected message type \"{}\" found for actor \"{}\"",
                              msg_type, to);
                 }
             }