[DOC] Fix `Ember.copy` Documentation

The documentation was incorrect: one must implement `copy()`, not
`clone()`.
Merge pull request #9695 from jherdman/em-copy-docs

[DOC] Fix `Ember.copy` Documentation
Use `appendView`
Merge pull request #9696 from twokul/view-tests

Use `appendView`
Ensure HTMLBars files are labeled for the correct module.
Merge pull request #9698 from rwjblue/htmlbars-docs-modules

Ensure HTMLBars files are labeled for the correct module.