test/yargi/documentation_test.rb in yargi-0.1.2 vs test/yargi/documentation_test.rb in yargi-0.2.0

@@ -1,44 +1,44 @@
 require 'test/unit'
 require 'yargi'
 
 module Yargi
-  
+
   # Here to check that what's in the documentation is correct
   class DocumentationTest < Test::Unit::TestCase
 
     module Source; end
     module Sink; end
 
     def test_README_example
       # create a directed graph
       digraph = Yargi::Digraph.new
-  
+
       # create 10 source and 5 sink vertices, tag them with user modules
       sources = digraph.add_n_vertices(5, Source)
       assert VertexSet===sources
-  
+
       # connect source to sink states
       edges = digraph.connect(sources, sources)
       assert EdgeSet===edges
-  
+
       # put some dot attributes
       sources.add_marks(:shape => 'circle', :label => '')
       edges.add_marks do |e|
         {:label => "From #{e.source.index} to #{e.target.index}"}
       end
-  
+
       # and print it
       dir = File.expand_path(File.dirname(__FILE__))
       dotfile = File.join(dir,"README-example.dot")
       gitfile = File.join(dir,"README-example.gif")
       File.open(dotfile, 'w') {|f| f << digraph.to_dot}
       begin
         `dot -Tgif -o #{gitfile} #{dotfile}`
       rescue => ex
-        $STDERR << "dot test failed, probably not installed\n#{ex.message}"
+        $stderr.puts "dot test failed, probably not installed\n#{ex.message}"
       end
     end
 
   end # class DocumentationTest
-  
+
 end