RFR: 8280403: RegEx: String.split can fail with NPE in Pattern.CharPredicate::match [v2]

[Ian Graves]

> Replacing a buggy NullPointerException in `Pattern.compile()` with the proper PatternSyntaxException

Ian Graves has updated the pull request incrementally with one additional commit since the last revision:

  Fixing docs and dates

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7201/files
  - new: https://git.openjdk.java.net/jdk/pull/7201/files/9a64df4a..3189490a

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7201&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7201&range=00-01

  Stats: 3 lines in 2 files changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7201.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7201/head:pull/7201

PR: https://git.openjdk.java.net/jdk/pull/7201