Minor simplification in debug code.

Cython/Plex/Scanners.py

@@ -292,7 +292,7 @@ class Scanner(object):
         else:  # input_state = 5
             self.cur_char = u''
         if self.trace:
-            print("--> [%d] %d %s" % (input_state, self.cur_pos, repr(self.cur_char)))
+            print("--> [%d] %d %r" % (input_state, self.cur_pos, self.cur_char))
 
     def position(self):
         """