fix dependency (and tag) descriptions stomping over other descriptions.

collect descriptions in a new array before joining them together.  put English
logic in separate function english_list.

lib/rspec-puppet/matchers/create_generic.rb

@@ -141,8 +141,8 @@ def failure_message_when_negated
       end
 
       def description
+        tests = []
         values = []
-        value_str_prefix = "with"
 
         if @expected_params_count
           values << "exactly #{@expected_params_count} parameters"
@@ -157,44 +157,39 @@ def description
         end
 
         if @notifies.any?
-          value_str_prefix = "that notifies"
-          values = @notifies
+          tests << english_list("that notifies", @notifies)
         end
 
         if @subscribes.any?
-          value_str_prefix = "that subscribes to"
-          values = @subscribes
+          tests << english_list("that subscribes to", @subscribes)
         end
 
         if @requires.any?
-          value_str_prefix = "that requires"
-          values = @requires
+          tests << english_list("that requires", @requires)
         end
 
         if @befores.any?
-          value_str_prefix = "that comes before"
-          values = @befores
+          tests << english_list("that comes before", @befores)
         end
 
         if @tagged.any?
-          value_str_prefix = "that is tagged"
-          values = @tagged
+          tests << english_list("that is tagged", @tagged)
         end
 
         if @not_tagged.any?
-          value_str_prefix = "that is not tagged"
-          values = @not_tagged
+          tests << english_list("that is not tagged", @not_tagged, "nor")
         end
 
         unless values.empty?
-          if values.length == 1
-            value_str = " #{value_str_prefix} #{values.first}"
-          else
-            value_str = " #{value_str_prefix} #{values[0..-2].join(", ")} and #{values[-1]}"
-          end
+          tests << english_list("with", values)
+        end
+
+        tests_str = ""
+        unless tests.empty?
+          tests_str = english_list("", tests, "and", true)
         end
 
-        "contain #{@referenced_type}[#{@title}]#{value_str}"
+        "contain #{@referenced_type}[#{@title}]#{tests_str}"
       end
 
       def diffable?
@@ -236,6 +231,16 @@ def generate_param_list(list, type)
         output
       end
 
+      def english_list(value_str_prefix, values, joiner='and', oxford_comma=false)
+        if values.length == 1
+          "#{value_str_prefix} #{values.first}"
+        elsif oxford_comma
+          "#{value_str_prefix} #{values[0..-2].join(", ")}, #{joiner} #{values[-1]}"
+        else
+          "#{value_str_prefix} #{values[0..-2].join(", ")} #{joiner} #{values[-1]}"
+        end
+      end
+
       def check_befores(catalogue, resource)
         @befores.each do |ref|
           unless precedes?(resource, canonicalize_resource(ref))