[PostGIS] #5754: ST_ForcePolygonCCW unexpectedly modifies line geometries

[PostGIS]

#5754: ST_ForcePolygonCCW unexpectedly modifies line geometries
---------------------+---------------------
 Reporter:  nti      |      Owner:  pramsey
     Type:  defect   |     Status:  new
 Priority:  medium   |  Milestone:
Component:  postgis  |    Version:  3.4.x
 Keywords:           |
---------------------+---------------------
 In constrast to what the documentation states ("Non-polygonal geometries
 are returned unchanged"), the function ST_ForcePolygonCCW does modify line
 geometries.

 Consider this SQL:


 {{{
 WITH geom AS ( SELECT ST_GeomFromText(
     'LINESTRING(0 0, 1 1, 2 0, 3 1, 4 0)'
     ) AS geom
 )
 SELECT ST_AsText(geom), ST_AsText(st_forcepolygonccw(geom)),
 st_astext(st_forcepolygoncw(st_forcepolygonccw(geom))) FROM geom;
 }}}

 In addition, using ST_ForcePolygonCW on the output of ST_ForcePolygonCCW
 does not modify the geometry. So I currently have no option to return to
 the original input line geometry.
-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/5754>
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