* for-of: IteratorClose spec compatibility.
See #3:
https://tc39.github.io/ecma262/#sec-iteratorclose
* Update spec fixtures for for-of.
* Fix IteratorClose case for remap-async-to-generator.
* Fix IteratorClose case for async-generator-function test output.
* Modify few tests according to iteratorClose fix.
* Fix iteratorClose for helpers.slicedToArray also.
* Update iteratorClose fixture for commonjs.
* Don't merge test options.
Particularly, I don't want `lodash/merge` to merge my specific plugins
with the general test plugins. It led to odd behavior where I could
enable a loose transform in my specific test, just to have it overridden
by the test fixture's general options.
* Need options
* Remove whitespace generation and rely on default printing
Changes to printing:
* Add newline after last empty SwitchCase
* Add newlines around block comments if they are non-flow comments or contain newlines
* Fix a few more fixtures
* Handle arrow function processing via shared API rather than default plugin.
* Fix a few small PR comments.
* Preserve existing spec arrow 'this' rewrites, and support spec in subclass constructors.
Previously, all "bare imports" (e.g. `import './foo';`) were moved to the
end of the array of sources. I presume this was done to remove needless
variables in the callback signature.
Unfortunately, doing this actually changes the intent of the program.
Modules should be evaluated in the order that they were in the source.
In the case of a bare import, it is quite possible that the bare import
has side effects that a later required module should see. With the current
implementation the later imported modules are evaluated before that "side
effecty" module has been evaluated.
Obviously, it is better to avoid these sorts of side effect ridden modules
but even still you could imagine a similar issue with cycles.
This change ensures that module source order is preserved in the AMD
dependencies list, and avoids making needless variables as much as possible.
