ST_CurveToLine duplicates last point when linearizing circle

[dbaston]

Depends on the tolerance settings used. As seen in the output of.

select st_astext(st_curvetoline('CIRCULARSTRING(0 0, 1 0, 0 0)', 14, 0));

Checked in 2.5.x, may occur earlier.

[pramsey]

And the output of that in turn leads to fun results when going back to curve:

select st_astext(st_linetocurve(st_curvetoline('CIRCULARSTRING(0 0, 1 0, 0 0)', 14, 0)));

[pramsey]

In 17185:

Avoid final point duplicates for circle stroking
References #4283

[pramsey]

In 17186:

Avoid final point duplicates for circle stroking
References #4283

[pramsey]

In 17187:

Avoid final point duplicates for circle stroking
References #4283