RFR: 8295456: (ch) sun.nio.ch.Util::checkBufferPositionAligned gives misleading/incorrect error [v2]

[Brian Burkhalter]

> Improve `IOException` message in `sun.nio.ch.Util::checkBufferPositionAligned`.

Brian Burkhalter has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:

  8295456: (ch) sun.nio.ch.Util::checkBufferPositionAligned gives misleading/incorrect error

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Changes:
  - all: https://git.openjdk.org/jdk/pull/10753/files
  - new: https://git.openjdk.org/jdk/pull/10753/files/b073ad68..a09caf96

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10753&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10753&range=00-01

  Stats: 4 lines in 2 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/10753.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10753/head:pull/10753

PR: https://git.openjdk.org/jdk/pull/10753