[PR][php-langspec][#41][master][closed] - Fixed occurrence of NULL that was outside of back-ticks.

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Newsgroups php.standards
Message-ID <[email protected]> 
You can view the Pull Request on github:
https://github.com/php/php-langspec/pull/41

Pull Request Description:
Whenever the PHP value `NULL` is used elsewhere in the spec, it is surrounded by back-ticks. The lack of back-ticks here seems to be a minor inconsistency.
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