[hidingmyname]

Javadoc-only corrections; no code or API changes.

• PrecisionUtil.precisionScale javadoc links to PrecisionModel#round; PrecisionModel has no round method (it's makePrecise) #1247: Replace nonexistent PrecisionModel.round links with makePrecise(double) and makePrecise(Coordinate), using valid member-link syntax.
• RelatePointLocator.locateWithDim javadoc has an empty @param polygon (param is parentPolygonal) and says it returns a Location; it returns a DimensionLocation code #1248: Describe both locateWithDim return values as DimensionLocation codes and document parentPolygonal, including the null argument used by the one-argument overload.
• TriDelaunayImprover.improveNonDelaunay javadoc documents @param tri0 and @param tri1; the method takes (Tri tri, int index) #1249: Replace stale tri0/tri1 parameter tags with tri and index; describe index as the edge of tri to test.
• DD.extractSignificantDigits javadoc documents @param y and @param decimalPointPos; the method takes (boolean insertDecimalPoint, int[] magnitude) #1250: Describe extraction from this number's absolute value and document insertDecimalPoint plus the one-element magnitude output array.

Fixes #1247
Fixes #1248
Fixes #1249
Fixes #1250

[dr-jts]

Excellent, thanks.