Kill trailing whitespace in ruby files

app/controllers/comments_controller.rb

@@ -3,7 +3,7 @@ class CommentsController < ApplicationController
   before_filter :member_only, :only => [:update, :create, :edit, :destroy]
   rescue_from User::PrivilegeError, :with => "static/access_denied"
   rescue_from ActiveRecord::StatementInvalid, :with => :search_error
-  
+
   def index
     if params[:group_by] == "comment"
       index_by_comment
@@ -13,21 +13,21 @@ class CommentsController < ApplicationController
       index_by_post
     end
   end
-  
+
   def search
   end
-  
+
   def new
     redirect_to comments_path
   end
-  
+
   def update
     @comment = Comment.find(params[:id])
     check_privilege(@comment)
     @comment.update_attributes(params[:comment])
     respond_with(@comment, :location => post_path(@comment.post_id))
   end
-  
+
   def create
     @comment = Comment.create(params[:comment])
     respond_with(@comment) do |format|
@@ -40,20 +40,20 @@ class CommentsController < ApplicationController
       end
     end
   end
-  
+
   def edit
     @comment = Comment.find(params[:id])
     check_privilege(@comment)
     respond_with(@comment)
   end
-  
+
   def show
     @comment = Comment.find(params[:id])
     respond_with(@comment) do |format|
       format.json {render :json => @comment.to_json(:methods => [:creator_name])}
     end
   end
-  
+
   def destroy
     @comment = Comment.find(params[:id])
     check_privilege(@comment)
@@ -62,7 +62,7 @@ class CommentsController < ApplicationController
       format.js
     end
   end
-  
+
 private
   def index_for_post
     @post = Post.find(params[:post_id])
@@ -78,14 +78,14 @@ private
       format.html {render :action => "index_by_post"}
     end
   end
-  
+
   def index_by_comment
     @comments = Comment.search(params[:search]).order("comments.id DESC").paginate(params[:page], :search_count => params[:search])
     respond_with(@comments) do |format|
       format.html {render :action => "index_by_comment"}
     end
   end
-  
+
   def check_privilege(comment)
     if !comment.editable_by?(CurrentUser.user)
       raise User::PrivilegeError
@@ -93,7 +93,7 @@ private
   end
 
 protected
-  
+
   def search_error(e)
     if e.message =~ /syntax error in tsquery/
       @error_message = "Meta-tags are not supported in comment searches by tag"