Change some instances of .connect() to .join()

src/libsyntax/ext/tt/macro_parser.rs

@@ -465,7 +465,7 @@ pub fn parse(sess: &ParseSess,
                                 token::get_ident(bind))).to_string()
                       }
                       _ => panic!()
-                    } }).collect::<Vec<String>>().connect(" or ");
+                    } }).collect::<Vec<String>>().join(" or ");
                 return Error(sp, format!(
                     "local ambiguity: multiple parsing options: \
                      built-in NTs {} or {} other options.",