Auto merge of #19576 - canaltinova:text-align, r=Manishearth,emilio

style: Move text-align outside of the mako file.

I will need this refactoring before my next job. I didn't actually fix the FIXME's along the way. My other PR probably will cover these.

---
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/19576)
<!-- Reviewable:end -->

components/style_derive/parse.rs

@@ -20,9 +20,10 @@ pub fn derive(input: DeriveInput) -> Tokens {
         );
 
         let identifier = cg::to_css_identifier(variant.ident.as_ref());
+        let ident = &variant.ident;
         match_body = quote! {
             #match_body
-            #identifier => Ok(#name::#variant),
+            #identifier => Ok(#name::#ident),
         }
     });