RFR: 8315485: (fs) Move java/nio/file/Path/Misc.java tests into java/nio/file/Path/PathOps.java [v2]

[Brian Burkhalter]

> In the `java/nio/file/Path` tests, add to `PathOps` tests equivalent to those in `Misc` and then remove the latter.

Brian Burkhalter has updated the pull request incrementally with two additional commits since the last revision:

 - 8315485: Fix whitespace errors
 - 8315485: Refactor equals()

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Changes:
  - all: https://git.openjdk.org/jdk/pull/15572/files
  - new: https://git.openjdk.org/jdk/pull/15572/files/e5dc8a0f..2c4b9501

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15572&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15572&range=00-01

  Stats: 34 lines in 1 file changed: 9 ins; 14 del; 11 mod
  Patch: https://git.openjdk.org/jdk/pull/15572.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15572/head:pull/15572

PR: https://git.openjdk.org/jdk/pull/15572