Adhere to tidy script

src/libsyntax/parse/parser.rs

@@ -3619,7 +3619,8 @@ impl<'a> Parser<'a> {
         let (iattrs, body) = self.parse_inner_attrs_and_block()?;
         attrs.extend(iattrs);
         if self.eat_keyword(keywords::Catch) {
-            let mut error = self.struct_span_err(self.prev_span, "`try {} catch` is not a valid syntax");
+            let mut error = self.struct_span_err(self.prev_span,
+                                                 "`try {} catch` is not a valid syntax");
             error.help("try using `match` on the result of the `try` block instead");
             Err(error)
         } else {