[Mark Rejhon]

1. It's not the CODE tag.
2. It's not Index.

It's the wordwrapping algorithm in vBulletin that affects all text posted - It breaks long unbroken pieces of text. I know, it shouldn't act upon CODE blocks, though...

The word "Index" is a common term at the end of a long computer code line, so Index is only a coincidence.

To workaround, simply add carefully-positioned spaces. I just edited your post to add a space after the paranthesis, and that eliminated the automatic space break in the middle of an unbroken "long string of text with no whitespace".