RFR: 8259637: java.io.File.getCanonicalPath() returns different values for same path [v2]

[Brian Burkhalter]

> Modify the `collapse()` function to remove each instance of ".." when the path is absolute and there is no preceding name.

Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:

  8259637: Use Stream.of in test

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Changes:
  - all: https://git.openjdk.org/jdk/pull/17089/files
  - new: https://git.openjdk.org/jdk/pull/17089/files/d2f755b0..cd2b3776

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17089&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17089&range=00-01

  Stats: 14 lines in 1 file changed: 0 ins; 7 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/17089.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17089/head:pull/17089

PR: https://git.openjdk.org/jdk/pull/17089