<i18n dev> RFR: 8263668: Update java.time to use instanceof pattern variable [v7]

[Patrick Concannon]

> Hi,
> 
> Could someone please review my code for updating the code in the `java.time` package to make use of the `instanceof` pattern variable?
> 
> Kind regards,
> Patrick

Patrick Concannon has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 10 additional commits since the last revision:

 - Updated single letter pattern variable name in java/time/Duration
 - Merge remote-tracking branch 'origin/master' into JDK-8263668
 - Updated single letter pattern variable names
 - Merge remote-tracking branch 'origin/master' into JDK-8263668
 - Merge remote-tracking branch 'origin/master' into JDK-8263668
 - Merge remote-tracking branch 'origin/master' into JDK-8263668
 - Merge remote-tracking branch 'origin/master' into JDK-8263668
 - Merge remote-tracking branch 'origin/master' into JDK-8263668
 - Merge remote-tracking branch 'origin/master' into JDK-8263668
 - 8263668: Update java.time to use instanceof pattern variable

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3170/files
  - new: https://git.openjdk.java.net/jdk/pull/3170/files/647bd6b1..3dc1e075

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3170&range=06
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3170&range=05-06

  Stats: 2549 lines in 111 files changed: 1748 ins; 362 del; 439 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3170.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3170/head:pull/3170

PR: https://git.openjdk.java.net/jdk/pull/3170