Move some compile-fail errors based on proc-macro2 update

test_suite/tests/compile-fail/remote/missing_field.rs

@@ -20,7 +20,7 @@ mod remote {
 #[serde(remote = "remote::S")]
 struct S {
     a: u8,
-    //~^^^^ ERROR: missing field `b` in initializer of `remote::S`
+    //~^^^ ERROR: missing field `b` in initializer of `remote::S`
 }
 
 fn main() {}

test_suite/tests/compile-fail/remote/unknown_field.rs

@@ -18,9 +18,9 @@ mod remote {
 #[derive(Serialize, Deserialize)]
 #[serde(remote = "remote::S")]
 struct S {
-    //~^^^ ERROR: struct `remote::S` has no field named `b`
     b: u8,
-    //~^^^^^ ERROR: no field `b` on type `&remote::S`
+    //~^ ERROR: struct `remote::S` has no field named `b`
+    //~^^ ERROR: no field `b` on type `&remote::S`
 }
 
 fn main() {}