Whitespace normalization.

Lib/pdb.py

@@ -1076,4 +1076,3 @@ def main():
 # When invoked as main program, invoke the debugger on a script
 if __name__=='__main__':
     main()
-        

Lib/subprocess.py

@@ -1137,5 +1137,3 @@ if __name__ == "__main__":
         _demo_windows()
     else:
         _demo_posix()
-
-    

Lib/test/test_subprocess.py

@@ -511,4 +511,3 @@ def test_main():
 
 if __name__ == "__main__":
     test_main()
-