RFR: 8253812: Cleanup AbstractMemberWriter [v2]

[Jonathan Gibbons]

> This is primarily a cosmetic cleanup for the doc comments on `AbstractMemberWriter`, but cleaning up some of the
> comments leaked into fixing up comments on overridden methods as well.

Jonathan Gibbons has updated the pull request incrementally with one additional commit since the last revision:

  fix typo reported in review

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/405/files
  - new: https://git.openjdk.java.net/jdk/pull/405/files/835e70d0..138e013b

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=405&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=405&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/405.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/405/head:pull/405

PR: https://git.openjdk.java.net/jdk/pull/405