Kill trailing whitespace in ruby files

app/controllers/artists_controller.rb

@@ -2,28 +2,28 @@ class ArtistsController < ApplicationController
   respond_to :html, :xml, :json
   before_filter :member_only, :except => [:index, :show, :banned]
   before_filter :admin_only, :only => [:ban]
-  
+
   def new
     @artist = Artist.new_with_defaults(params)
     respond_with(@artist)
   end
-  
+
   def edit
     @artist = Artist.find(params[:id])
     respond_with(@artist)
   end
-  
+
   def banned
     @artists = Artist.where("is_banned = ?", true).order("name")
     respond_with(@artists)
   end
-  
+
   def ban
     @artist = Artist.find(params[:id])
     @artist.ban!
     redirect_to(artist_path(@artist), :notice => "Artist was banned")
   end
-  
+
   def index
     @artists = Artist.search(params[:search] || params).order("id desc").paginate(params[:page])
     respond_with(@artists) do |format|
@@ -35,34 +35,34 @@ class ArtistsController < ApplicationController
       end
     end
   end
-  
+
   def search
   end
-  
+
   def show
     @artist = Artist.find(params[:id])
     @post_set = PostSets::Artist.new(@artist)
     respond_with(@artist)
   end
-  
+
   def create
     @artist = Artist.create(params[:artist], :as => CurrentUser.role)
     respond_with(@artist)
   end
-  
+
   def update
     @artist = Artist.find(params[:id])
     @artist.update_attributes(params[:artist], :as => CurrentUser.role)
     respond_with(@artist)
   end
-  
+
   def revert
     @artist = Artist.find(params[:id])
     @version = ArtistVersion.find(params[:version_id])
     @artist.revert_to!(@version)
     respond_with(@artist)
   end
-  
+
   def show_or_new
     @artist = Artist.find_by_name(params[:name])
     if @artist