Updated code, get rid of obsolete feature calls in libraries and examples

examples/tutorial/step_4/hello/src/hello_execution.e

@@ -54,7 +54,7 @@ feature -- Execution
 			if attached {WSF_STRING} req.item ("user") as u then
 				--| If yes, say hello world #name
 
-				l_user_name := (create {HTML_ENCODER}).decoded_string (u.value)
+				l_user_name := (create {HTML_ENCODER}).decoded_string (u.value.to_string_8)
 
 				s := "<p>Hello " + mesg.html_encoded_string (l_user_name) + "!</p>"
 				s.append ("Display a <a href=%"/users/" + u.url_encoded_value + "/message/%">message</a></p>")

examples/tutorial/step_4/hello/src/user_message_handler.e

@@ -86,7 +86,7 @@ feature -- Access
 	html_decoded_string (v: READABLE_STRING_32): READABLE_STRING_32
 		do
 			if v.is_valid_as_string_8 then
-				Result := (create {HTML_ENCODER}).decoded_string (v)
+				Result := (create {HTML_ENCODER}).decoded_string (v.to_string_8)
 			else
 				Result := v
 			end