RFR: JDK-8295236: Update JavaDoc in javafx.geometry.Point3D [v4]

[Douglas Held]

> The JavaDoc for equals had a copy/paste error. I normalized the text based on the JavaDoc for method java.awt.Point#equals. ~~I also changed formatting in the method signatures of equals(), hashCode() and toString().~~
> 
> For good measure, some kind of copy/paste detection should probably be added to the many automated checks. For the entire OpenJDK project.

Douglas Held has updated the pull request incrementally with one additional commit since the last revision:

  Update Point3D.java
  
  Per review

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Changes:
  - all: https://git.openjdk.org/jfx/pull/913/files
  - new: https://git.openjdk.org/jfx/pull/913/files/0c52ce57..eb08b561

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=913&range=03
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=913&range=02-03

  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jfx/pull/913.diff
  Fetch: git fetch https://git.openjdk.org/jfx pull/913/head:pull/913

PR: https://git.openjdk.org/jfx/pull/913