old_contents: #!/usr/bin/env python
  SIMULATION_TIME_IN_SECONDS = 40
  DELTA_T = 0.1 # this is the sampling time
  STEPS = int(SIMULATION_TIME_IN_SECONDS / DELTA_T)
  K_V = 0.90
  K_W = 0.90
  
new_contents: #!/usr/bin/env python
  SIMULATION_TIME_IN_SECONDS = 40
  DELTA_T = 0.1 # this is the sampling time
  STEPS = int(SIMULATION_TIME_IN_SECONDS / DELTA_T)
  K_V = 0.90
  K_W = 0.90
  TRAJECTORY_TYPE = 'linear'
  
subject: Add constant TRAJECTORY_TYPE