.jshintrc

narrow: drop checkambig=True when restoring backup

IIUC, checkambig is about updating timestamps of the file while
renaming. That's important for the dirstate, but we never check the
timestamp of the narrowspec file. We can therefore avoid checking
passing checkambig=True.

Differential Revision: https://phab.mercurial-scm.org/D4098

{
    // 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)
}