Fix all the trailing whitespace

app/models/topic_link.rb

@@ -2,7 +2,7 @@ require 'uri'
 require_dependency 'slug'
 
 class TopicLink < ActiveRecord::Base
-  
+
   belongs_to :topic
   belongs_to :user
   belongs_to :post
@@ -26,7 +26,7 @@ class TopicLink < ActiveRecord::Base
   # Extract any urls in body
   def self.extract_from(post)
     return unless post.present?
-    
+
     TopicLink.transaction do
 
       added_urls = []
@@ -37,7 +37,7 @@ class TopicLink < ActiveRecord::Base
         .map{|u| [u, URI.parse(u)] rescue nil}
         .reject{|u,p| p.nil?}
         .uniq{|u,p| u}
-        .each do |url, parsed|    
+        .each do |url, parsed|
         begin
 
           internal = false
@@ -45,7 +45,7 @@ class TopicLink < ActiveRecord::Base
           post_number = nil
           if parsed.host == Discourse.current_hostname || !parsed.host
             internal = true
-            
+
             route = Rails.application.routes.recognize_path(parsed.path)
             topic_id = route[:topic_id]
             post_number = route[:post_number] || 1
@@ -55,8 +55,8 @@ class TopicLink < ActiveRecord::Base
           next if topic_id == post.topic_id
 
           added_urls << url
-          TopicLink.create(post_id: post.id, 
-                                 user_id: post.user_id, 
+          TopicLink.create(post_id: post.id,
+                                 user_id: post.user_id,
                                  topic_id: post.topic_id,
                                  url: url,
                                  domain: parsed.host || Discourse.current_hostname,
@@ -94,9 +94,9 @@ class TopicLink < ActiveRecord::Base
         rescue URI::InvalidURIError
           # if the URI is invalid, don't store it.
         rescue ActionController::RoutingError
-          # If we can't find the route, no big deal  
+          # If we can't find the route, no big deal
         end
-      end  
+      end
 
       # Remove links that aren't there anymore
       if added_urls.present?