RFR: 8285890: Fix some @param tags

[Pavel Rappo]

* Syntactically improves a few cases from 8285676 (https://github.com/openjdk/jdk/pull/8410)
* Fixes a few misspelled `@param` tags for elements that, although are not included in the API Documentation, are visible in and processed by IDEs

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Commit messages:
 - Fix misspelled `@param`
 - Clarify with whitespace tags from 8285676

Changes: https://git.openjdk.java.net/jdk/pull/8465/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8465&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8285890
  Stats: 16 lines in 8 files changed: 0 ins; 0 del; 16 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8465.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8465/head:pull/8465

PR: https://git.openjdk.java.net/jdk/pull/8465