8264514: HexFormat implementation tweaks

[rgiulietti]

Please review these small tweaks.

For background information see 1

Greetings
Raffaello

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Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change must be properly reviewed

Issue

• JDK-8264514: HexFormat implementation tweaks

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk pull/3295/head:pull/3295
$ git checkout pull/3295

Update a local copy of the PR:
$ git checkout pull/3295
$ git pull https://git.openjdk.java.net/jdk pull/3295/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 3295

View PR using the GUI difftool:
$ git pr show -t 3295

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk/pull/3295.diff

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[openjdk]

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[mlbridge]

Webrevs

• 01: Full - Incremental (21e7402b)
• 00: Full (123f3101)