_xhrArg() meaningless parameter

[bill]

In the definition of dojo.xhr() there's the line:

var xhr = dfd.ioArgs.xhr = _d._xhrObj(dfd.ioArgs.args);

Apparently _xhrObj() doesn't take any argument.

Also, there are many places in that function definition where dfd.ioArgs is accessed where we could use the local variable ioArgs.

[James Burke]

The passing of the args is on purpose, there is a comment above the line explaining why. It allows other code to intercept and give an alternate XHR implementation. I'll fix the dfd.ioArgs calls.

[James Burke]

(In [20735]) Fixes #10287, use the shorter ioArgs where possible, expand the comment about the _xhrObj call.

[bill]

Oops, sorry for the false alarm, didn't notice the comment because I was looking at the output from shrinksafe (with comments stripped; I can't find a way to leave them in).