Use Session::diagnostic in more places.

compiler/rustc_parse/src/parser/attr_wrapper.rs

@@ -266,8 +266,7 @@ impl<'a> Parser<'a> {
             if let Some(attr_range) = self.capture_state.inner_attr_ranges.remove(&inner_attr.id) {
                 inner_attr_replace_ranges.push(attr_range);
             } else {
-                self.sess
-                    .span_diagnostic
+                self.diagnostic()
                     .span_delayed_bug(inner_attr.span, "Missing token range for attribute");
             }
         }