Update 241H spec. Minor runtime tweak.

lib/kgrader/runtime.rb

@@ -31,7 +31,7 @@ module KGrader
       IO.new(4).write text + "\n"
     end
 
-    def shake
+    def salt
       ARGV[0]
     end
 

spec/cs241h

@@ -1 +1 @@
-Subproject commit bac3b71f3215b1193a2c9dc17372aff375f888cc
+Subproject commit 5ab70e4f1d8c1fdb06994324b452f185c045d9b4