Clarify the behavior of `java.lang.Readable` when the specified `java.nio.CharBuffer` parameter is empty but read-only, and when it is full.
------------- Commit messages: - 8222329: Readable read(CharBuffer) does not specify that 0 is returned when there is no remaining space in buffer Changes: https://git.openjdk.org/jdk/pull/14616/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14616&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8222329 Stats: 17 lines in 3 files changed: 9 ins; 0 del; 8 mod Patch: https://git.openjdk.org/jdk/pull/14616.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/14616/head:pull/14616 PR: https://git.openjdk.org/jdk/pull/14616
