Buggy text editor and syntax highlighter

[lm28]

I'm doing the MAZE challenge, and although I have seen the error in the hurdles challenge too - I never figured out how the problem got rectified.
After multiple attempts, and closing/reopening the in a new browser page, the code just started working again.

My code (so far) for the maze is:

def turn_right():
turn_left()
turn_left()
turn_left()

while not at_goal():
while wall_on_right() and front_is_clear():
move()
if wall_in_front():
turn_right()
elif:
turn_left()

but I get this error : I could not analyze this error; you might want to contact my programmer with a description of this problem.

At one point, the error message suggested that I turn off syntax highlighting. The question is "Where/How do I do that ?"

It might help if the text editor could show hidden characters somehow.
I have also noticed that if i change the font size (or resize the browser window so that it fills the screen), then the cursor gets "lost" in the text editor. Sometime flashing at a different size, between lines of code (like ' at the Harry potter station on platform 3 1/2)

[lm28]

Ah - I see the 'elif' instead of 'else' - my bad. But it would still help to so if text ed and syntax highlighter issues could be solved.