git: openjdk/jdk: 8199594: Add doc describing how (?x) ignores spaces in character classes

[Ian Graves]

Changeset: a1c0a6aa
Author:    Ian Graves <igraves at openjdk.org>
Date:      2021-07-23 19:17:02 +0000
URL:       https://git.openjdk.java.net/jdk/commit/a1c0a6aafb575e3d5c76dd3a279e4fe03ca07223

8199594: Add doc describing how (?x) ignores spaces in character classes

Reviewed-by: darcy, naoto, iris, lancea, bpb

! src/java.base/share/classes/java/util/regex/Pattern.java