RFR: 8251989: Hex formatting and parsing utility [v2]

[Roger Riggs]

On Tue, 13 Oct 2020 21:56:31 GMT, Marcono1234 <github.com+11685886+Marcono1234 at openjdk.org> wrote:

>> Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Various code review comments, rename UpperCase and LowerCase methods to match Character, remove unnecessary Class name
>>   qualifications, etc.
>
> test/jdk/java/util/HexFormat/HexFormatTest.java line 383:
> 
>> 381:
>> 382:     @Test
>> 383:     static void testVariableLength() {
> 
> This test does not contain any assertions.

Added missing assertions.

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PR: https://git.openjdk.java.net/jdk/pull/482