You're printing one thing and returning a different one. You overwrote what you did in array2 with array.

Log
How Can Mirrors Be Real If Our Eyes Aren't Real

i tested my function in console and it returned the string with capital first letters, but here it says:

Failed asserting that two strings are identical.
Expected: 'How Can Mirrors Be Real If Our Eyes Aren't Real'
Actual : 'How can mirrors be real if our eyes aren't real'

My console returns: How Can Mirrors Be Real If Our Eyes Aren't Real
i'm not sure what's wrong