syntax error, unexpected keyword_ensure, expecting $end - ruby-on-rails

Question

I've been trying to figure out this error for about 3 hours and have found other examples with same title, but didn't find any solution yet..
The website says:
syntax error, unexpected keyword_ensure, expecting $end, in /controllers/carts_controller.rb Line 17
respond_to do |format| /////// <-- says here the problem
The rails server says the problem is:
views/carts/show.html.erb:21: syntax error, unexpected keyword_ensure, expecting $end
...and here is the whole code:
/controllers/carts_controller.rb
class CartsController < ApplicationController
def index
#carts = Cart.all
respond_to do |format|
format.html # index.html.erb
format.xml { render :xml => #carts }
end
end
def show
begin
#cart = Cart.find(params[:id])
rescue ActiveRecord::RecordNotFound
logger.error "Attempt to access ionvalid cart #{params[:id]}"
redirect_to store_url, :notice => 'Invalid cart'
else
respond_to do |format|
format.html
format.xml { render :xml => #cart }
end
end
end
def new
#cart = Cart.new
respond_to do |format|
format.html
format.xml { render :xml => #cart }
end
end
def edit
#cart = Cart.find(params[:id])
end
def create
#cart = Cart.new(cart_params)
respond_to do |format|
if #cart.save
format.html { redirect_to #cart, notice: 'Cart was successfully created.' }
format.json { render action: 'show', status: :created, location: #cart }
else
format.html { render action: 'new' }
format.json { render json: #cart.errors, status: :unprocessable_entity }
end
end
end
def update
#cart = Cart.find(params[:id])
respond_to do |format|
if #cart.update_attributes(params[:cart])
format.html { redirect_to(#cart, :notice => 'Cart was successfully updated.') }
format.xml { head :ok }
else
format.html { render :action => "edit" }
format.xml { render :xml => #cart.errors, :status => :unprocessable_entity }
end
end
end
def destroy
#cart = current_cart
#cart.destroy
session[:cart_id] = nil
respond_to do |format|
format.html {redirect_to(store_url, :notice => 'Your cart is currently empty') }
format.xml { head :ok }
end
end
end
indented all code
the view:
views/carts/show.html.erb
<div class="cart_title">Your Cart</div>
<table>
<%= render(cart.line_items) %>
<tr class="total_line">
<td colspan="2">Total</td>
<td class="total_cell"><%= number_to_currency(cart.total_price) %></td>
</tr>
</table>
<%= button_to 'Empty cart', cart, :method => :delete, :confirm => 'Are you sure?' %>
SOLUTION FOUND:
The problem was on views/carts/show.html.erb. Changing cart to #cart solved the problem.
Thanks for the help.