.jshintrc

scmutil: document that bookmarkrevs() ignores non-head bookmark branch

"- ancestors(head() and not bookmark(%s))" excludes the bookmarked branch
itself if bookmark(%s) is not a head. I'm a bit surprised by this behavior
while writing "log -B" tests, so let's document it.

{
    // 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)
}