Some sequence function implementations incorrectly check the bounds of the index argument #56
Description
The Java implementations of the sequence functions ExcludeAt, IncludeAllAt and IncludeAt incorrectly check that their index argument is less than or equal to the size of their sequence argument plus 1, rather than just being less than the size of the sequence. This results in an IndexOutOfBoundsException if the index is exactly one more than the size of the sequence argument.