[postgis-tickets] [PostGIS] #4011: Update ST_LineMerge docs and test cases

[PostGIS]

#4011: Update ST_LineMerge docs and test cases
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 Reporter:  dbaston  |      Owner:  pramsey
     Type:  defect   |     Status:  new
 Priority:  medium   |  Milestone:  PostGIS 2.4.4
Component:  postgis  |    Version:  2.4.x
 Keywords:           |
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 This stack exchange answer contains some needed additions to the
 ST_LineMerge docs to describe behavior with empty or invalid inputs.

 The answer also includes some test cases that could be put into the
 regression suite.

 https://gis.stackexchange.com/a/270171/18189

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4011>
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