Make Proc into method, so it's available elsewhere.

features/support/helpers/dogtail.rb

@@ -90,28 +90,29 @@ module Dogtail
       $vm.execute("rm -f '#{script_path}'")
     end
 
+    def self.value_to_s(v)
+      if v == true
+        'True'
+      elsif v == false
+        'False'
+      elsif v.class == String
+        "'#{v}'"
+      elsif [Fixnum, Float].include?(v.class)
+        v.to_s
+      else
+        raise "#{self.class.name} does not know how to handle argument type '#{v.class}'"
+      end
+    end
+
     def self.args_to_s(args)
       args_list = args
       args_hash = nil
       if args_list.class == Array && args_list.last.class == Hash
         *args_list, args_hash = args_list
       end
-      argify = Proc.new do |v|
-        if v == true
-          'True'
-        elsif v == false
-          'False'
-        elsif v.class == String
-          "'#{v}'"
-        elsif [Fixnum, Float].include?(v.class)
-          v.to_s
-        else
-          raise "#{self.class.name} does not know how to handle argument type '#{v.class}'"
-        end
-      end
       (
-        (args_list.nil? ? [] : args_list.map { |e| argify.call(e) }) +
-        (args_hash.nil? ? [] : args_hash.map { |k, v| "#{k}=#{argify.call(v)}" })
+        (args_list.nil? ? [] : args_list.map { |e| self.value_to_s(e) }) +
+        (args_hash.nil? ? [] : args_hash.map { |k, v| "#{k}=#{self.value_to_s(v)}" })
       ).join(', ')
     end