[wp-trac] [WordPress Trac] #60710: save_post_{$post->post_type} hook returns inconsistent $_POST['tax_input'] format

[WordPress Trac]

#60710: save_post_{$post->post_type} hook returns inconsistent $_POST['tax_input']
format
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 Reporter:  jenUnderscore_  |      Owner:  (none)
     Type:  defect (bug)    |     Status:  new
 Priority:  normal          |  Milestone:  Awaiting Review
Component:  Taxonomy        |    Version:  6.4.3
 Severity:  normal          |   Keywords:
  Focuses:                  |
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 In the save_post_{$post->post_type} hook:

 **Case 1**: If we do not make any changes to the taxonomy
 `$_POST['tax_input'][$term]` returns a comma delimited string WITH a
 space.

 Output Example: ''Maple, Spring, Summer, Winter''

 **Case 2**: If we modify the taxonomy (adding or removing), it eliminates
 the space:

 Output Example: ''Spring,Summer,Winter''

 Proposed solution, eliminate the space in the first case for consistency.

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Ticket URL: <https://core.trac.wordpress.org/ticket/60710>
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