factor: trim using lists

[factor.git] / extra / rot13 / rot13.factor

diff --git a/extra/rot13/rot13.factor b/extra/rot13/rot13.factor
index c8f08bcf30a1cfbcba5804c21a1f2895ac640e24..b364f4530d4f0d3f9aa405fb03b7d17cc7883577 100644 (file)
--- a/extra/rot13/rot13.factor
+++ b/extra/rot13/rot13.factor
@@ -1,6 +1,6 @@
 ! Copyright (C) 2006 Daniel Ehrenberg
 ! See http://factorcode.org/license.txt for BSD license.
-USING: kernel math sequences strings io combinators ascii ;
+USING: kernel math sequences io combinators ascii ;
 IN: rot13
 
 : rotate ( ch base -- ch ) [ - 13 + 26 mod ] [ + ] bi ;