RFR: 8331077 : nroff man page update for jar tool [v3]

[Weibing Xiao]

> nroff man page update for jar tool. <br>
> 
> This update is caused by the change of https://bugs.openjdk.org/browse/JDK-8318971. While the .md man pages got updated in other repos, the corresponding nroff man page was never updated in OpenJDK repos

Weibing Xiao has updated the pull request incrementally with one additional commit since the last revision:

  Revert "8331427: Rename confusingly named ArraysSupport.signedHashCode"
  
  This reverts commit 4f529f8c232b4082aa4aa39766bcf42b09885ee4.

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/19034/files
  - new: https://git.openjdk.org/jdk/pull/19034/files/333dbc36..051da56e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19034&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19034&range=01-02

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/19034.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19034/head:pull/19034

PR: https://git.openjdk.org/jdk/pull/19034