[wp-trac] [WordPress Trac] #64452: get_block_wrapper_attributes() function strips falsy values like zero

[WordPress Trac]

#64452: get_block_wrapper_attributes() function strips falsy values like zero
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 Reporter:  wildworks                 |       Owner:  (none)
     Type:  defect (bug)              |      Status:  new
 Priority:  normal                    |   Milestone:  Awaiting Review
Component:  Editor                    |     Version:
 Severity:  normal                    |  Resolution:
 Keywords:  has-patch has-unit-tests  |     Focuses:
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Comment (by ekaterina92):

 What an interesting case! I could reprodure class 0 situation. Patch for
 it solves the issue + unit test passes, but I am afraid that css don't
 actually allow class names starting with a number (at least it should be
 escaped /).

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Ticket URL: <https://core.trac.wordpress.org/ticket/64452#comment:7>
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