Logged In: YES 
user_id=55188

Surprisingly, it doesn't affect source code lines.  But, I'm
still wondering why it isn't counted as a distinct line. :)

>>> raise ValueError
Traceback (most recent call last):
  File "<pyshell#3>", line 1, in -toplevel-
    raise ValueError
ValueError

>>> if 1:
	pass
	raise ValueError
Traceback (most recent call last):
  File "<pyshell#9>", line 3, in -toplevel-
    raise ValueError
ValueError

Okay. I agree that it's too late to change behavior, but it
may need to write some errata item about this inconsistency
of IDLE vs terminal interactive mode on documentation.