[wp-trac] [WordPress Trac] #38777: Add method to merge one WP_Error into another

[WordPress Trac]

#38777: Add method to merge one WP_Error into another
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 Reporter:  rmccue                    |       Owner:  johnbillion
     Type:  feature request           |      Status:  reviewing
 Priority:  normal                    |   Milestone:  5.6
Component:  General                   |     Version:
 Severity:  normal                    |  Resolution:
 Keywords:  has-patch has-unit-tests  |     Focuses:  rest-api
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Comment (by johnbillion):

 [attachment:"38777.6.diff"] adds a test for the direct `error_data`
 property manipulation that Timothy mentioned above, and tweaks a bunch of
 docblocks.

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Ticket URL: <https://core.trac.wordpress.org/ticket/38777#comment:27>
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