error while using catkin_make In beginners tutorial

edit

I am doing the beginners tutorials (simple publisher and subscriber).

This is my copy of CMakeLists.txt

cmake_minimum_required(VERSION 2.8.3)
project(beginner_tutorials)

## Find catkin and any catkin packages
find_package(catkin REQUIRED COMPONENTS roscpp rospy std_msgs genmsg)

## Declare ROS messages and services
#add_message_files(FILES Num.msg)
#add_service_files(FILES AddTwoInts.srv)

## Generate added messages and services
#generate_messages(DEPENDENCIES std_msgs)

## Declare a catkin package
catkin_package()

## Build talker and listener
include_directories(include ${catkin_INCLUDE_DIRS})

add_executable(talker src/talker.cpp)
target_link_libraries(talker ${catkin_LIBRARIES})
add_dependencies(talker beginner_tutorials_generate_messages_cpp)

add_executable(listener src/listener.cpp)
target_link_libraries(listener ${catkin_LIBRARIES})
add_dependencies(listener beginner_tutorials_generate_messages_cpp)

I then used catkin_make and got the following error:

CMake Error at beginner_tutorials/CMakeLists.txt:18 (include_directories):
  Syntax error in cmake code at

    /home/tejdeep/catkin_ws/src/beginner_tutorials/CMakeLists.txt:18

  when parsing string

    ${{catkin_

  syntax error, unexpected $end, expecting }} (9)


-- Configuring incomplete, errors occurred!
make: *** [cmake_check_build_system] Error 1
Invoking "make cmake_check_build_system" failed