displaying error message(p tag was missing) and adding output as comment

activemodel/examples/validations.rb

@@ -22,8 +22,8 @@ class Person
 end
 
 person1 = Person.new
-p person1.valid?
-person1.errors
+p person1.valid? # => false
+p person1.errors.messages # => {:name=>["can't be blank"]}
 
 person2 = Person.new(:name => "matz")
-p person2.valid?
+p person2.valid? # => true