.jshintrc

py3: introduce and use pycompat.getargspec

This is getfullargspec on py3, which means we can't use namedtuple
named accessors for all fields (eg keywords from getargspec is varkw
from getfullargspec, with the same meaning). Solves some warning
issues on Python 3.

I didn't clean up httpclient because that's vendored code I think we
should probably discard, and I didn't touch the manpage generator for
now either.

Differential Revision: https://phab.mercurial-scm.org/D2251

{
    // 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)
}