[patch] Delete unnecessary generality in loadFile

[Rui Ueyama]

This is a change I wanted to create, so LGTM. Thank you for doing this.

One thing this could be improved is probably to return
ErrorOr<unique_ptr<File>> instead of error_code. Returning the actual
return value using 3rd argument which is passed-by-reference looks a bit
weird.

On Thu, Apr 23, 2015 at 1:06 PM, Rafael Espíndola <
rafael.espindola at gmail.com> wrote:

> loadFile can load mulitple files just because yaml has a feature for
> putting multiple documents in one file.
>
> Designing a linker around what yaml can do seems like a bad idea to
> me. The attached wip patch changes it to read a single file. It also
> updates one test to show the difference.
>
> OK with the remaining tests updated?
>
> Cheers,
> Rafael
>
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