Fix regexp in cython-mode.el

Tools/cython-mode.el

@@ -52,7 +52,7 @@
        symbol-start (group "ctypedef")
        ;; type specifier: at least 1 non-identifier symbol + 1 identifier
        ;; symbol and anything but a comment-starter after that.
-       (opt (regexp "[^a-zA-z0-9_\n]+[a-zA-Z0-9_][^#\n]*")
+       (opt (regexp "[^a-zA-Z0-9_\n]+[a-zA-Z0-9_][^#\n]*")
             ;; type alias: an identifier
             symbol-start (group (regexp "[a-zA-Z_]+[a-zA-Z0-9_]*"))
             ;; space-or-comments till the end of the line