RFR: JDK-8266779: Use <wbr> instead of ZERO_WIDTH_SPACE [v3]

[Hannes Wallnöfer]

> This replaces usages of the zero-width space character (ZWSP, entity `​`) with the HTML5 `<wbr>` element. `<wbr>` acts as a word break opportunity without adding characters to the text content like ZWSP does. It is supported in all modern browsers, the only browser I  know of which doesn't support is are old versions of Internet Explorer. 
> 
> https://developer.mozilla.org/en-US/docs/Web/HTML/Element/wbr
> https://caniuse.com/wbr-element
> 
> I have tested the output (both layout and copy-paste behaviour) on Firefox, Safari, and Chrome on Mac OS X.

Hannes Wallnöfer has updated the pull request incrementally with one additional commit since the last revision:

  JDK-8266779: Update comment and copyright years

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3946/files
  - new: https://git.openjdk.java.net/jdk/pull/3946/files/a5508d09..3433a4ec

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3946&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3946&range=01-02

  Stats: 6 lines in 6 files changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3946.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3946/head:pull/3946

PR: https://git.openjdk.java.net/jdk/pull/3946