RFR: JDK-8295391: Add discussion of binary <-> decimal conversion issues [v3]

[Joe Darcy]

> Add discussion of some of the common pitfalls related to decimal <-> binary conversion.

Joe Darcy has updated the pull request incrementally with one additional commit since the last revision:

  Switch to parseFloat from valueOf, add links.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/16566/files
  - new: https://git.openjdk.org/jdk/pull/16566/files/0ac7125c..b0aab59d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16566&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16566&range=01-02

  Stats: 20 lines in 2 files changed: 9 ins; 0 del; 11 mod
  Patch: https://git.openjdk.org/jdk/pull/16566.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16566/head:pull/16566

PR: https://git.openjdk.org/jdk/pull/16566