fix(angular.copy): support copying XML nodes

[petebacondarwin]

Closes #5429

[petebacondarwin]

Good old Internet Explorer:

IE 11.0.0 (Windows 8.1) angular copy should support XML nodes FAILED
    Expected '<?XML:NAMESPACE PREFIX = "PUBLIC" NS = "URN:COMPONENT" /><foo></foo>' to equal '<foo></foo>'.

[gkalpak]

Did you force-push a fix for the IE issue ?

[gkalpak]

_{" --> ' ? 😊}

[petebacondarwin]

:-) cut and paste from the original commit

[petebacondarwin]

@gkalpak - yes I hid my shame with a forced push. It was not really IE's fault (well yes it probably was, but it was mine too). Can you spot the mistake in my test:

    it("should support XML nodes", function() {
      var anElement = document.createElement("foo");
      var theCopy = anElement.cloneNode();
      expect(copy(anElement.outerHTML)).toEqual(theCopy.outerHTML);
      expect(copy(anElement)).not.toBe(anElement);
    });

[petebacondarwin]

@gkalpak and @jbedard I added a commit with your suggested changes. Thanks

[gkalpak]

@petebacondarwin

Can you spot the mistake in my test

You mean besides the "..." ? 😄
Oh...and the misplaced parenthesis :)

LGTM

[petebacondarwin]

Thanks. I'll merge