RFR: JDK-8266779: Use <wbr> instead of ZERO_WIDTH_SPACE [v2]

[Hannes Wallnoefer]

Thanks for the review, Pavel.

> Am 10.05.2021 um 16:21 schrieb Pavel Rappo <prappo at openjdk.java.net>:
> 
> 
> It's unfortunate that the text blocks in tests are formatted for a fixed width; diffs are filled with unrelated changes. Update copyright years and you're good to go. Thanks for fixing this, Hannes.

It’s not great to look at a „brick“ of text, but it’s much easier for spotting changes than in a huge line several hundred of characters long. Not to mention traditional string literals with their escaped quotes. So even though it’s still bulky, it’s much better than what we had before.

Hannes