rename string to word

lib/parfait/string.rb

@@ -1,6 +0,0 @@
-
-
-module Parfait
-  class String < Object
-  end
-end

lib/parfait/word.rb

@@ -0,0 +1,12 @@
+
+
+module Parfait
+  # A word is a a short sequence of characters
+  # Characters are not modeled as objects but as (small) integers
+  # The small means two of them have to fit into a machine word, iw utf16 or similar
+  #
+  # Words are constant, maybe like js strings, ruby symbols
+  # Words are short, but may have spaces
+  class Word < Object
+  end
+end