RFR: JDK-8243982 Fix testing documentation after JDK-8240241

[Alexandre (Shura) Iline]

Thank you for fixing it, Magnus.

Sorry I forgot about it.

Shura

> On Apr 28, 2020, at 2:18 AM, Magnus Ihse Bursie <magnus.ihse.bursie at oracle.com> wrote:
> 
> Unfortunately, the fix for JDK-8240241 did not properly update the testing.html file (and added a trailing whitespace in the markdown file).
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8243982
> WebRev: http://cr.openjdk.java.net/~ihse/JDK-8243982-fix-testing-html/webrev.01
> 
> /Magnus