Remove --testdox parameter from phpunit command

[donquixote]

The Issue

The test output from ddev phpunit has the following problems:

• The previous exception is not shown, see TestDox printer does not show previous exception sebastianbergmann/phpunit#5863
• The "HTML output was generated" message from Drupal is not shown.

How does this happen?
Currently the phpunit command from this package calls phpunit with a --testdox parameter.
This parameter replaces the printer we previously set with --printer.

How This PR Solves The Issue

By removing the --testdox argument, we fall back to the Drupal output printer.
A developer can still manually append --testdox by running ddev phpunit --testdox, if they prefer that format.

Manual Testing Instructions

In a project with the ddev-drupal-contrib extension, create a test case like this:

use PHPUnit\Framework\TestCase;

class ExampleUnitTest extends TestCase {
  public function testFoo() {
    throw new \Exception('Outer', previous: new \Exception('Inner'));
  }
}

Optionally, add a Drupal web test (e.g. FunctionalJavascript) with a failed assertion.

Run ddev phpunit.

Expected:

• For the ExampleUnitTest, we see the message and backtrace for "Inner" and "Outer" exceptions in the phpunit output.
• For the web test, we see a section with "HTML output was generated", with a list of links.

Actual:

• For the ExampleUnitTest, we don't see anything about "Inner" exception or its backtrace.
• For the web test, we don't see the "HTML output was generated" section.

Automated Testing Overview

Not yet. I first want to see what fails by doing this change..

Related Issue Link(s)

Interesting post: #29 (comment)

Update .ddev/commands/web/phpunit command

Remove #ddev-generated from the top (line 3)
Remove --testdox from line 22

Release/Deployment Notes

[weitzman]

I like the output of testdox but it has unwanted byproduct, as you say.

[donquixote]

Yeah I was going to write the output with --testdox is definitely pretty.
Maybe in a future version we can get it to work without the side effect.