RFR: 8265261: java/nio/file/Files/InterruptCopy.java fails with java.lang.RuntimeException: Copy was not interrupted

[Brian Burkhalter]

This proposal suggests to change the timing of testing whether a file copy is terminated by an interrupt.

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Commit messages:
 - 8265261: java/nio/file/Files/InterruptCopy.java fails with java.lang.RuntimeException: Copy was not interrupted

Changes: https://git.openjdk.java.net/jdk/pull/5154/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5154&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8265261
  Stats: 26 lines in 1 file changed: 18 ins; 0 del; 8 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5154.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5154/head:pull/5154

PR: https://git.openjdk.java.net/jdk/pull/5154