Fix a test target

tests/target/chains.rs

@@ -224,9 +224,12 @@ impl Foo {
                     if attr.check_name("doc") {
                         if let Some(mi) = attr.meta() {
                             if let Some(value) = mi.value_str() {
-                                doc_strings.push(
-                                    DocFragment::Include(line, attr.span, filename, contents),
-                                );
+                                doc_strings.push(DocFragment::Include(
+                                    line,
+                                    attr.span,
+                                    filename,
+                                    contents,
+                                ));
                             }
                         }
                     }