[PostGIS] #5594: Error example in ST_LineExtend document

[PostGIS]

#5594: Error example in ST_LineExtend document
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  Reporter:  Wenjing        |      Owner:  pramsey
      Type:  defect         |     Status:  reopened
  Priority:  high           |  Milestone:  PostGIS 3.4.1
 Component:  documentation  |    Version:  3.4.x
Resolution:                 |   Keywords:
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Changes (by robe):

 * status:  closed => reopened
 * resolution:  fixed =>

Comment:

 per Brent Wood this is still wrong.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5594#comment:4>
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