RFR: JDK-8266856 Make <wbr> element void

[Jonathan Gibbons]

On Tue, 18 May 2021 17:36:44 GMT, Vicente Romero <vromero at openjdk.org> wrote:

>> Please review a simple fix to treat `war` as a void element.
>
> test/langtools/tools/doclint/html/HtmlVersionTagsAttrsTest.java line 154:
> 
>> 152:      * </template>
>> 153:      * <p>Test current time is <time>10:00</time> at night</p>
>> 154:      * <p>Test<wbr>text</p>
> 
> this is a positive test shouldnt we have negative tests too?

I guess I felt this was close to a `noreg-trivial` change to an element that is rarely used, at least in doc comments. The only reason there's a test at at is because it is a holdover from the HTML5 conversion.

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PR: https://git.openjdk.java.net/jdk/pull/4098