ext/ripper/lib/ripper/lexer.rb: fix a wrong delegation

The target method name is a typo.

ext/ripper/lib/ripper/lexer.rb

@@ -54,7 +54,7 @@ class Ripper
       def pretty_print(q) q.text(to_s) end
       def ==(i) super or to_int == i end
       def &(i) self.class.new(to_int & i) end
-      def |(i) self.class.new(to_int & i) end
+      def |(i) self.class.new(to_int | i) end
       def allbits?(i) to_int.allbits?(i) end
       def anybits?(i) to_int.anybits?(i) end
       def nobits?(i) to_int.nobits?(i) end