Add line endings before HTML blocks when they are preceded by blocks.

[chenzhiguang]

Now it is 100% GFM!

Benchmarks

Before

After

[coveralls]

Pull Request Test Coverage Report for Build 4045859439

• 6 of 6 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.01%) to 96.031%

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Totals
Change from base Build 4038688727:	0.01%
Covered Lines:	1379
Relevant Lines:	1436

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💛 - Coveralls

[kevmoo]

How's performance?

[chenzhiguang]

Performance has no change. I have just added the benchmarks in description.

[kevmoo]

Ready for you @srawlins – then we can publish?

[chenzhiguang]

Awesome!