[PostGIS] #5677: ST_Union(geom[]) doesn't union single member arrays

[PostGIS]

#5677: ST_Union(geom[]) doesn't union single member arrays
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  Reporter:  pramsey  |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 3.5.0
 Component:  postgis  |    Version:  3.4.x
Resolution:           |   Keywords:
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Comment (by Paul Ramsey <pramsey@…>):

 In [changeset:"15c8d95efcff17d1d1b993a3e5480cb7c490760b/git" 15c8d95/git]:
 {{{#!CommitTicketReference repository="git"
 revision="15c8d95efcff17d1d1b993a3e5480cb7c490760b"
 Union the contents of a single-member array before returning, so that
 collections get flattened. References #5677
 }}}
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5677#comment:2>
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