Yo, i'm getting a strange error on this.
I'm pulling the last char of the String using the index s[-1]
but i got a string index out of range error.
I'm assuming that this means it's testing using a null or empty string at some point, which is kind of cheeky.
One could assume that you'll always be passed a string with Something in it right?

I know, i know. validate your inputs. But still, after passing all tests and still getting an error, it's a bit frustrating.

-traceback below-

Traceback (most recent call last):
File "tests.py", line 17, in
test.assert_equals(remove(inp), exp)
File "/workspace/default/solution.py", line 2, in remove
if (s[-1] == '!'):
IndexError: string index out of range