Update main.py

Author: cybergalactic

src/python_vehicle_simulator/main.py

@@ -5,8 +5,8 @@
  to simulate and test guidance, navigation and control (GNC) systems.
 
 Reference: T. I. Fossen (2021). Handbook of Marine Craft Hydrodynamics and
-Motion Control. 2nd. Edition, Wiley. 
-URL: www.fossen.biz/wiley 
+Motion Control. 2nd edition, John Wiley & Sons, Chichester, UK. 
+URL: https://www.fossen.biz/wiley 
  
 Author: Thor I. Fossen
 """
@@ -17,7 +17,7 @@
 from python_vehicle_simulator.lib import *
 
 # Simulation parameters: 
-sampleTime = 0.02 # sample time
+sampleTime = 0.02 # sample time [seconds]
 N = 10000 # number of samples
 
 # 3D plot and animation parameters where browser = {firefox,chrome,safari,etc.}
@@ -47,7 +47,7 @@
 
 no = input("Please enter a vehicle no.: ") 
 
-match no:  # the match statement requires Python >= 3.10
+match no: # The match statement requires Python >= 3.10
  case '1': vehicle = DSRV('depthAutopilot',60.0)
  case '2': vehicle = frigate('headingAutopilot',10.0,100.0)
  case '3': vehicle = otter('headingAutopilot',100.0,0.3,-30.0,200.0) 
@@ -58,7 +58,7 @@
  case '8': vehicle = tanker('headingAutopilot',-20,0.5,150,20,80)
  case '9': vehicle = remus100('depthHeadingAutopilot',30,50,1525,0.5,170) 
  case _: print('Error: Not a valid simulator option'), sys.exit()
- 
+
 printVehicleinfo(vehicle, sampleTime, N)
 
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