many tiny changes

app/models/comment.rb

@@ -1,6 +1,10 @@
 class Comment < ActiveRecord::Base
   attr_accessible :text, :user, :blogpost, :post
+
   validates_presence_of :text, :user, :blogpost
+  validates_length_of :text, :in => 4..1000
+
+
   belongs_to :blogpost
   belongs_to :user
 end