If a key is defined with a Unicode keysym and also marked as a letter using the plus sign, loadkeys complains about a syntax error.

E.g. (to assign the character 'a' to the second leftmost key in the home row on a PC keyboard):

   echo 'keycode 30 = +U+0061' | loadkeys

gives the error:

   (null):1: syntax error
   syntax error in map file
   key bindings not changed

whereas

   echo 'keycode 30 = U+0061' | loadkeys

and

   echo 'keycode 30 = +0x61' | loadkeys

do not.

`loadkeys --version` returns "loadkeys from kbd 1.15".