RFR: 8264160: Regex \b is not consistent with \w without UNICODE_CHARACTER_CLASS [v2]

[Ian Graves]

> Proposed change in behavior to correct inconsistencies between `\w` and `\b` metacharacters

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

  Bug id's to header and some other cleanup

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7539/files
  - new: https://git.openjdk.java.net/jdk/pull/7539/files/7177ac44..b0e98fab

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7539&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7539&range=00-01

  Stats: 3 lines in 1 file changed: 1 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7539.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7539/head:pull/7539

PR: https://git.openjdk.java.net/jdk/pull/7539