[jdk11u-dev] RFR: 8305733: Pattern.CASE_INSENSITIVE does not take effect in jdk11 [v5]

[Korov]

> fix [JDK-8305733](https://bugs.openjdk.org/browse/JDK-8305733)

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

 - update test
 - update test

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

Changes:
  - all: https://git.openjdk.org/jdk11u-dev/pull/2062/files
  - new: https://git.openjdk.org/jdk11u-dev/pull/2062/files/83b600df..fc72b89f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2062&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2062&range=03-04

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2062.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2062/head:pull/2062

PR: https://git.openjdk.org/jdk11u-dev/pull/2062