Add bin and edit workflow

bin/gems/yell-2.2.2/examples/006.2-the-loggable-module-with-inheritance.rb

@@ -0,0 +1,41 @@
+# encoding: utf-8
+
+require_relative '../lib/yell'
+
+puts <<-EOS
+
+# You can add logging to any class by including the Yell::Loggable module.
+#
+# When including the module, your class will get a :logger method. Before you
+# can use it, though, you will need to define a logger providing the :name of
+# your class.
+
+Yell.new :stdout, name: 'Foo'
+
+# Define the class
+class Foo
+  include Yell::Loggable
+end
+
+class Bar < Foo; end
+
+bar = Bar.new
+bar.logger.info "Hello World!"
+#=> "2012-02-29T09:30:00+01:00 [ INFO] 65784 : Hello World!"
+
+
+EOS
+
+puts "=== actual example ==="
+
+Yell.new :stdout, name: 'Foo'
+
+class Foo
+  include Yell::Loggable
+end
+
+class Bar < Foo; end
+
+bar = Bar.new
+bar.logger.info "Hello World!"
+