clean up attribute parsing

packages/rsx/src/errors.rs

@@ -1,12 +1,12 @@
 macro_rules! missing_trailing_comma {
     ($span:expr) => {
-        return Err(Error::new($span, "missing trailing comma"));
+        return Err(syn::Error::new($span, "missing trailing comma"));
     };
 }
 
 macro_rules! attr_after_element {
     ($span:expr) => {
-        return Err(Error::new($span, "expected element\n  = help move the attribute above all the children and text elements"));
+        return Err(syn::Error::new($span, "expected element\n  = help move the attribute above all the children and text elements"));
     };
 }