Alexander Kachkaev a05fd118be Do not require space after markdown block language name (#4783)
https://github.com/prettier/prettier/pull/4153 made it possible to detect fenced code block language when it is followed by arguments (e.g. ` ```js {something=something} `). This PR makes it also possible to detect language in cases cases like ` ```js{something=something} ` (no space).

The reason for this change is that Atom highlights code blocks regardless of a space after the language name, which makes users wonder why the correctly detected code block is not being formatted:

<img width="324" alt="screen shot 2018-06-28 at 22 08 13" src="https://user-images.githubusercontent.com/608862/42060780-db11f5b6-7b1f-11e8-9f43-fe91843f7d89.png">

PR background: https://github.com/prettier/prettier/pull/4153#issuecomment-401174999
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2018-06-21 10:29:42 +08:00

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