[PostGIS] #5749: Documentation bug: Wrong example in ST_IsSimple

[PostGIS]

#5749: Documentation bug: Wrong example in ST_IsSimple
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 Reporter:  lukaseder  |      Owner:  pramsey
     Type:  defect     |     Status:  new
 Priority:  medium     |  Milestone:  PostGIS 3.4.3
Component:  postgis    |    Version:  3.4.x
 Keywords:             |
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 The first example in the documentation page for ST_IsSimple is wrong:
 https://postgis.net/docs/ST_IsSimple.html

 {{{
  SELECT ST_IsSimple(ST_GeomFromText('POLYGON((1 2, 3 4, 5 6, 1 2))'));
  st_issimple
 -------------
  t
 (1 row)
 }}}

 The result is false for this polygon as all the points are on one line.
 This would be a better example:

 {{{
 SELECT ST_IsSimple(ST_GeomFromText('POLYGON((0 0, 0 1, 1 1, 0 0))'));
 }}}
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5749>
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