py3: use email parser that operates on bytes
email.parser.Parser() operates on str in both Python 2 and 3.
Python 3.2 introduced the email.parser.BytesParser(), which works
like Parser except it accepts bytes.
We implement the pycompat helper as a function so we lazily
import the "email" module.
Differential Revision: https://phab.mercurial-scm.org/D2147
{
// 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)
}