Reconcile CLI.md to add new phpunit testdox option

Author: stronk7

docs/CLI.md

@@ -1945,7 +1945,7 @@ Run PHPUnit on a plugin
 
 ### Usage
 
-* `phpunit [-m|--moodle MOODLE] [--coverage-text] [--coverage-clover] [--coverage-pcov] [--coverage-xdebug] [--coverage-phpdbg] [--fail-on-incomplete] [--fail-on-risky] [--fail-on-skipped] [--fail-on-warning] [--] <plugin>`
+* `phpunit [-m|--moodle MOODLE] [--coverage-text] [--coverage-clover] [--coverage-pcov] [--coverage-xdebug] [--coverage-phpdbg] [--fail-on-incomplete] [--fail-on-risky] [--fail-on-skipped] [--fail-on-warning] [--testdox] [--] <plugin>`
 
 Run PHPUnit on a plugin
 
@@ -2061,6 +2061,16 @@ Treat tests with warnings as failures
 * Is negatable: no
 * Default: `false`
 
+#### `--testdox`
+
+Enable testdox formatter
+
+* Accept value: no
+* Is value required: no
+* Is multiple: no
+* Is negatable: no
+* Default: `false`
+
 #### `--help|-h`
 
 Display help for the given command. When no command is given display help for the list command