Fix custom error message for the "find a <something> photo"

- Added tests for this case

lib/moneypenny/responders/image.rb

@@ -18,7 +18,7 @@ def self.respond(message)
       when /^image me (.*)$/i
         image_response $1
       when /^find\ (a|an)\ (.+)\ (image|picture|photo)$/i
-        image_response $2, "I couldn't find #{$1} #{$2} #{3}."
+        image_response $2, "I couldn't find #{$1} #{$2} #{$3}."
       else
         false
       end

spec/responders/image_spec.rb

@@ -11,15 +11,20 @@
   end
 
   describe 'respond' do
+    bad_search_term = ".................."
+
     context 'given a message that it understands' do 
       it "should respond to 'image me'" do 
         Image.respond('image me cat').should match /^https?:\/\/\w/i
       end
       it "should respond to 'find a something image'" do
         Image.respond('find a cat image').should match /^https?:\/\/\w/i
       end
-      it "should pass back the error message for a failed search" do
-        Image.respond("image me ..................").should match /I was unable to find/
+      it "should pass back the default error message for a failed search" do
+        Image.respond("image me #{bad_search_term}").should match /I was unable to find/
+      end
+      it "should pass back a custom error message for a failed search" do
+        Image.respond("find a #{bad_search_term} photo").should match Regexp.new("a[^n].*#{bad_search_term}.*photo")
       end
     end