fix arithmetic operation

[haxibami]

This ensures the expected behavior for all CANDIDATE_LEADING_FIELDS values.

[cohml]

@haxibami I don't have any skin in the game of this PR, but I am curious enough to ask:

Can you provide one or two "before and after" examples demonstrating why the original code resulted in unexpected behavior and how your fix results in the expected behavior? Because to my reading, ! x == y and x != y are synonymous.

[haxibami]

@cohml But they do not seem to be synonymous.

Sample script:

#!/usr/bin/env zsh

VALUE=2

if (( ! $VALUE == 3 )); then
    echo "1st challenge: VALUE is not 3"
else
    echo "1st challenge: VALUE is 3"
fi

if (( $VALUE != 3 )); then
    echo "2nd challenge: VALUE is not 3"
else
    echo "2nd challenge: VALUE is 3"
fi

Output:

1st challenge: VALUE is 3
2nd challenge: VALUE is not 3

[joshskidmore]

I completely missed the arithmetic brackets (vs standard grouping [[ ]]).

[cohml]

Oh yeah! My brain interpreted those as brackets as well. Cheers, all! And that @haxibami for the example as requested.