index: drop support for negative indexes into the index
I want index[i] to work for any valid revnum including -1 (as it
already does), and I also want len(index) to be the number of
revisions in the index (not counting the null revision), so it cannot
also support negative revision numbers other than -1 for nullid.
I didn't bother removing support for it from revlog v0.
Differential Revision: https://phab.mercurial-scm.org/D4019
{
// Enforcing
"eqeqeq" : true, // true: Require triple equals (===) for comparison
"forin" : true, // true: Require filtering for..in loops with obj.hasOwnProperty()
"freeze" : true, // true: prohibits overwriting prototypes of native objects such as Array, Date etc.
"nonbsp" : true, // true: Prohibit "non-breaking whitespace" characters.
"undef" : true, // true: Require all non-global variables to be declared (prevents global leaks)
// Environments
"browser" : true // Web Browser (window, document, etc)
}