RFR: 8325382: (fc) FileChannel.transferTo throws IOException when position equals size [v2]

[Brian Burkhalter]

> In `FileChannelImpl.transferTo`, do not clamp the number of bytes to transfer to the number remaining in the source `FileChannel` unless the size of the source is positive. When clamping, do not use the strict inequality `remaining > 0`, but rather allow clamping to zero.

Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:

  8325382: Change sub-test name and check return

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Changes:
  - all: https://git.openjdk.org/jdk/pull/17796/files
  - new: https://git.openjdk.org/jdk/pull/17796/files/40370a4f..ecd01954

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17796&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17796&range=00-01

  Stats: 7 lines in 1 file changed: 4 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/17796.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17796/head:pull/17796

PR: https://git.openjdk.org/jdk/pull/17796