Issue #3590322 by dydave: Improved block class rendering by replacing...

David Suissarequested to merge
issue/block_class-3590322:3590322-improve-block-class into 3.0.x

https://www.drupal.org/project/block_class/issues/3590322

Improved block class rendering by replacing implementation of hook_preprocess_block with hook_block_view_alter.

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