RFR: 8136895: Writer not closed with disk full error, file resource leaked [v5]

[Brian Burkhalter]

> In`StreamEncoder::implClose`, move `flushLeftoverChar()` inside the `try` block and the closing of the underlying stream inside the `finally` block.

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

  8136895: Remove vestigial explicit calls to close() in implClose()

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Changes:
  - all: https://git.openjdk.org/jdk/pull/13503/files
  - new: https://git.openjdk.org/jdk/pull/13503/files/d1965996..a400b04e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13503&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13503&range=03-04

  Stats: 9 lines in 1 file changed: 0 ins; 7 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/13503.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13503/head:pull/13503

PR: https://git.openjdk.org/jdk/pull/13503