remove lib usage, update docs

extra/hexdump/hexdump-docs.factor

@@ -1,12 +1,22 @@
+! Copyright (C) 2008 Doug Coleman.
+! See http://factorcode.org/license.txt for BSD license.
 USING: help.markup help.syntax kernel ;
 IN: hexdump
 
 HELP: hexdump.
-{ $values { "seq" "a sequence" } }
+{ $values { "sequence" "a sequence" } }
 { $description "Converts a sequence to its hexadecimal and ASCII representation sixteen characters at a time and writes it to standard out." } ;
 
 HELP: hexdump
-{ $values { "seq" "a sequence" } { "str" "a string" } }
+{ $values { "sequence" "a sequence" } { "string" "a string" } }
 { $description "Converts a sequence to its hexadecimal and ASCII representation sixteen characters at a time.  Lines are separated by a newline character." }
 { $see-also hexdump. } ;
 
+ARTICLE: "hexdump" "Hexdump"
+"The " { $vocab-link "hexdump" } " vocabulary provides a traditional hexdump view of a sequence." $nl
+"Write hexdump to string:"
+{ $subsection hexdump }
+"Write the hexdump to the output stream:"
+{ $subsection hexdump. } ;
+
+ABOUT: "hexdump"

extra/hexdump/hexdump.factor

@@ -1,5 +1,8 @@
-USING: arrays io io.streams.string kernel math math.parser namespaces
+! Copyright (C) 2008 Doug Coleman.
-prettyprint sequences sequences.lib splitting grouping strings ascii ;
+! See http://factorcode.org/license.txt for BSD license.
+USING: arrays io io.streams.string kernel math math.parser
+namespaces prettyprint sequences splitting grouping strings
+ascii ;
 IN: hexdump
 
 <PRIVATE
@@ -21,11 +24,12 @@ IN: hexdump
     nl ;
 
 PRIVATE>
-: hexdump ( seq -- str )
+
+: hexdump ( sequence -- string )
     [
         dup length header.
         16 <sliced-groups> [ line. ] each-index
     ] with-string-writer ;
 
-: hexdump. ( seq -- )
+: hexdump. ( sequence -- )
     hexdump write ;