Bad CHANGES generated for #4579

The quoted text got mangled. The example was well formatted in the !9385 (merged) and now all the formatting has gone.

- Restore the ability to select individual unit tests. ``cfac05cc966``

  This adds the command line arguments: `-d` (debug), `-l` (list tests)
  and `-t test` (run this test) to the unit tests.

  e.g.  ```     % ./rdata_test -t zonemd     [==========] selected:
  Running 1 test(s).     [ RUN      ] zonemd     [       OK ] zonemd
  [==========] selected: 1 test(s) run.     [  PASSED  ] 1 test(s).
  %  ``` :gl:`#4579` :gl:`!9385`