RFR: 8254574: PrintWriter handling of InterruptedIOException is not documented

[Brian Burkhalter]

Remove reference to `java.io.InterruptedIOException` from `java.io.PrintStream`, and make the specifications of `checkError()`, `setError()`, and `clearError()` consistent between `java.io.PrintStream` and `java.io.PrintWriter`.

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Commit messages:
 - 8254574: PrintWriter handling of InterruptedIOException is not documented

Changes: https://git.openjdk.java.net/jdk/pull/7507/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7507&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8254574
  Stats: 21 lines in 2 files changed: 0 ins; 11 del; 10 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7507.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7507/head:pull/7507

PR: https://git.openjdk.java.net/jdk/pull/7507