hgrc: search XDG_CONFIG_HOME on mac
Searching for hgrc was special cased not to look through ~/.config/hg on Mac,
but that’s unnecessary: Macs support it as do other unix based systems. There
are plenty tools that use it there, e.g. git, and people expect it to work, e.g.
"https://stackoverflow.com/questions/72499837/mercurial-on-macos-doesnt-read-config-hg-hgrc".
Initial code introduced in 354020079723.
{
// 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)
}