Thank you man for clarifying this <3
You saved me from alot of hassle!
I had the exact same problem and it was very confusing for me because my diamonds are working fine ..

✘ Expected:" "pre *

instead got :pre *

I am having the same problem as you. My diamond comes out perfectly but isnt passing because they included that uncessary space between : and pre....
not sure how to get through it?

I wrote code which correctly produced diamonds, but the test kept failing because apparently my diamond wasn't the same as the desired diamonds. The 'expected' and 'actual' output seemed exactly the same and it took me over an hour to figure out the difference; the test expects a newline appended at the end of diamonds.

This shouldn't be a requirement. It's not listed in the requirements and the tests don't really show this either. I wasted an hour tracking this
down. I want my hour back.

It doesn't help that the 'actual' test output always has a space character prepended, further confusing me/the programmer.