<Swing Dev> RFR: 8265528: Specification of BasicSplitPaneDivider::getMinimumSize, getPreferredSize doesn't match with its behavior.

[Prasanta Sadhukhan]

The current specification of these 2 methods
api/java.desktop/javax/swing/plaf/basic/BasicSplitPaneDivider.html#getPreferredSize().
and
api/java.desktop/javax/swing/plaf/basic/BasicSplitPaneDivider.html#getMinimumSize()
does not specify correct return values. Also, the spec is not very intuitive and clear.

Rectified the spec to specify correct behaviour.

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Commit messages:
 - 8265528: Specification of BasicSplitPaneDivider::getMinimumSize,getPreferredSize doesn't match with its behavior.

Changes: https://git.openjdk.java.net/jdk/pull/3870/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3870&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8265528
  Stats: 17 lines in 1 file changed: 14 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3870.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3870/head:pull/3870

PR: https://git.openjdk.java.net/jdk/pull/3870