RFR: 8351897: Extra closing curly brace typos in Javadoc [v2]

[Archie Cobbs]

> This PR fixes minor Javadoc typos in a few `java.base` classes. Extra curly braces have been sneaking in.

Archie Cobbs has updated the pull request incrementally with one additional commit since the last revision:

  Apply font fixes per review suggestion.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24022/files
  - new: https://git.openjdk.org/jdk/pull/24022/files/784dad33..dde1c867

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24022&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24022&range=00-01

  Stats: 6 lines in 2 files changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/24022.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24022/head:pull/24022

PR: https://git.openjdk.org/jdk/pull/24022