fixed the indentation

enclosure_escape.py

#!/usr/bin/env python
import roslib; roslib.load_manifest('enclosure_escape')
import rospy
from geometry_msgs.msg import Twist
from turtlebot_node.msg import TurtlebotSensorState
# global variables
bump = False

# listen (adapted from line_follower
def processSensing(TurtlebotSensorState):
   global bump
   bump = TurtlebotSensorState.bumps_wheeldrops > 0
   #newInfo = True


def hello_create():
   pub = rospy.Publisher('/turtlebot_node/cmd_vel', Twist)
   rospy.Subscriber('/turtlebot_node/sensor_state', TurtlebotSensorState, processSensing)
   rospy.init_node('hello_create')
   #listen
   global bump
   twist = Twist()
   while not rospy.is_shutdown():
       if bump:
           str = "hello create, you have bumped into something  %s"%rospy.get_time()
           rospy.loginfo(str)
           twist.linear.x = 0; twist.linear.y = 0; twist.linear.z = 0
           twist.angular.x = 0; twist.angular.y = 0; twist.angular.z = 0
           bump = False
       else:
           str = "hello create, you can spin now %s"%rospy.get_time()
           rospy.loginfo(str)
           twist.linear.x = 0.1; twist.linear.y = 0; twist.linear.z = 0
           twist.angular.x = 0; twist.angular.y = 0; twist.angular.z = 0.1
       pub.publish(twist)
       rospy.sleep(0.25)
if __name__ == '__main__':
   try:
       hello_create()
   except rospy.ROSInterruptException: pass