Quick fix. first_char_at:last_char_at is an array [ ; ), so last_char_at is not included.
Quick fix.
first_char_at:last_char_at is an array [ ; ), so last_char_at is not included.

When trying to print characters, we added width to the starting character and later
substracted it. As a result

[ 's' | 't' | 'r' ]

   4     5     6

Therefore first_char_at + width() - 1 is 4 + 3 - 1 = 6

It should be 7, not 6.

WielkiZielonyMelon/go_trying