doc: missing negation in streams doc

[jrieken]

from https://nodejs.org/dist/latest-v6.x/docs/api/stream.html#stream_errors_while_reading

The doc for Errors While Reading says:

Throwing an Error from within readable._read() can result in expected and inconsistent behavior depending on whether the stream is operating in flowing or paused mode. Using the 'error' event ensures consistent and predictable handling of errors.

and I believe it should be ...can result in UNexpected and inconsistent behavior...

[jrieken]

Seems to be fixed on master

[evanlucas]

hm, I still see it under Errors While Writing. Want to submit a pull request to fix?

[jrieken]

Sure, will open PR. I was tricked by two Errors While Reading sections, one is correct...