Address nits.

src/librustc/middle/traits/object_safety.rs

@@ -38,17 +38,16 @@ pub enum ObjectSafetyViolation<'tcx> {
 /// Reasons a method might not be object-safe.
 #[deriving(Copy,Clone,Show)]
 pub enum MethodViolationCode {
-    /// fn(self),
+    /// e.g., `fn(self)`
     ByValueSelf,
 
-    // fn foo()
+    /// e.g., `fn foo()`
     StaticMethod,
 
-    // fn foo(&self, x: Self)
-    // fn foo(&self) -> Self
+    /// e.g., `fn foo(&self, x: Self)` or `fn foo(&self) -> Self`
     ReferencesSelf,
 
-    // fn foo<A>(),
+    /// e.g., `fn foo<A>()`
     Generic,
 }
 

src/librustc/middle/traits/select.rs

@@ -1045,16 +1045,11 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
                upcast_trait_ref.repr(self.tcx()));
 
         // check whether the upcast version of the trait-ref matches what we are looking for
-        match
-            self.infcx.probe(
-                |_| self.match_poly_trait_ref(obligation, upcast_trait_ref.clone()))
-        {
-            Ok(()) => {
+        if let Ok(()) = self.infcx.probe(|_| self.match_poly_trait_ref(obligation,
+                                                                       upcast_trait_ref.clone())) {
             debug!("assemble_candidates_from_object_ty: matched, pushing candidate");
             candidates.vec.push(ObjectCandidate);
         }
-            Err(()) => { }
-        }
     }
 
     ///////////////////////////////////////////////////////////////////////////