.jshintrc

rust-dirstatemap: add unit tests

These were missing and have already proven valuable since they have found
two bugs (fixed in previous patches).

There may be other behavior to test, but this gives us a decent coverage.

Differential Revision: https://phab.mercurial-scm.org/D12524

{
    // 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)
}