[whatwg/streams] Fix use of `this` in AcquireWritableStreamDefaultWriter (#555)

AcquireWritableStreamDefaultWriter references `this` despite being an
abstract operation called with a `stream` parameter.

Replace `this` with `stream`.
You can view, comment on, or merge this pull request online at:

  https://github.com/whatwg/streams/pull/555

-- Commit Summary --

  * Fix use of `this` in AcquireWritableStreamDefaultWriter

-- File Changes --

    M index.bs (2)

-- Patch Links --

https://github.com/whatwg/streams/pull/555.patch
https://github.com/whatwg/streams/pull/555.diff

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/whatwg/streams/pull/555