RFR: 8342934: TYPE_USE annotations printed with error causing ", " in toString output

[Joe Darcy]

Use space instead of comma as a delimiter when building the string of type annotations.

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Commit messages:
 - JDK-8342934: TYPE_USE annotations printed with error causing "," in toString output

Changes: https://git.openjdk.org/jdk/pull/21702/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21702&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8342934
  Stats: 8 lines in 3 files changed: 4 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/21702.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21702/head:pull/21702

PR: https://git.openjdk.org/jdk/pull/21702