better msg

mailanes.rb

@@ -797,7 +797,7 @@
       params[:d] ? "It was the reaction to [this](http://www.mailanes.com/delivery?id=#{params[:d]})." : '',
       "There are #{list.recipients.active_count} active subscribers in the list still,",
       "out of #{list.recipients.count} total.",
-      "This is what we know about the recipient:\n\n```\n#{recipient.yaml.to_yaml}\n```"
+      recipient.yaml.empty? ? '' : "This is what we know about the recipient:\n\n```\n#{recipient.yaml.to_yaml}\n```"
     )
     recipient.post_event("Unsubscribed#{@locals[:user] ? " by @#{current_user}" : ''}.")
   else

objects/yaml_doc.rb

@@ -31,6 +31,10 @@ def initialize(text)
     @text = text
   end
 
+  def empty?
+    load.empty?
+  end
+
   def load
     hash = YAML.safe_load(@text)
     hash = {} unless hash.is_a?(Hash)

test/test_yaml_doc.rb

@@ -32,6 +32,12 @@ def test_loads_valid_yaml
     assert_equal(25, yaml['age'])
   end
 
+  def test_checks_emptiness
+    assert(YamlDoc.new('').empty?)
+    assert(YamlDoc.new("---\n").empty?)
+    assert(!YamlDoc.new("a: b\n").empty?)
+  end
+
   def test_saves_valid_yaml
     text = YamlDoc.new("title: \"Test\"\nage: 25").save
     assert(text.include?('title: Test'), text)