.jshintrc

errors: make InterventionRequired subclass Abort

The docstring for `Abort` says that it's for errors raised by commands
and `InterventionRequired` is definitely something raised by commands,
so it seems that it should be an `Abort`. This patch makes it so. It
adds a `coarse_exit_code` (in addition to the already existing
`detailed_exit_code`) to `Abort` to achieve that, since
`InterventionRequired` should result in a special exit code even when
the `ui.detailed-exit-code` config is not set.

Differential Revision: https://phab.mercurial-scm.org/D10737

{
    // 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)
}