Use _write in stop_and_persist

[ushpizin]

Description of new feature, or changes

I noticed that the method Halo._write is used everywhere, except in Halo._stop_and_persist, where the string is written directly to the _stream.

In pytest the output is captured and the stream gets closed after the test, so this fix was critical for me.

Checklist

• [x] Your branch is up-to-date with the base branch
• [x] You've included at least one test if this is a new feature
• [x] All tests are passing

Related Issues and Discussions

People to notify

[coveralls]

Pull Request Test Coverage Report for Build 408

• 1 of 2 (50.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 91.019%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
halo/halo.py	1	2	50.0%
<!--	Total:	1	2	50.0%	-->

Totals
Change from base Build 406:	0.0%
Covered Lines:	306
Relevant Lines:	330

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💛 - Coveralls

[manrajgrover]

@ushpizin Thanks for working on this. LGTM! Can you bump the version as well before I merge this?

[ushpizin]

Sure 👍