fix itemprop containing articleBody

[AndyTheFactory]

Issue by AndyTheFactory
Tue Oct 4 16:23:29 2022
Originally opened as codelucas/newspaper#953

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If itemprop is not exactly == "articleBody" the node was "cleaned"

for instance itemprop="description articleBody" would be cleaned. Blogspot / Blogger for instance uses this itemprop

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AndyTheFactory included the following code: https://github.com/codelucas/newspaper/pull/953/commits