bin/validate in schematron-0.0.0 vs bin/validate in schematron-0.0.1

@@ -1,15 +1,14 @@
 #!/usr/bin/ruby
 
+require 'optparse'
 require 'libxml'
 require 'schematron'
 
 include LibXML
 
-if ARGV.size != 2
-  $stderr.puts "usage: validate [schematron] [instance]"
-  exit 1
-end
+
+puts "Usage: validate [schematron] [instance]" if ARGV.size != 2
 
 # use the line numbers
 XML.default_line_numbers = true
 
 # Get sch and xml from command line