RFR: 8339852: Fix typos in java.compiler documentation [v2]

[Pavel Rappo]

> Please review this PR to fix typos and formatting issues. Some typos are trivial, others relate to domain vocabulary.

Pavel Rappo has updated the pull request incrementally with one additional commit since the last revision:

  Dan's feedback

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Changes:
  - all: https://git.openjdk.org/jdk/pull/20937/files
  - new: https://git.openjdk.org/jdk/pull/20937/files/ab574c56..76588ba0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20937&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20937&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/20937.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20937/head:pull/20937

PR: https://git.openjdk.org/jdk/pull/20937