Mini fixes

[bicpi]

Q	A
Doc fix?	yes
New docs?	no
Applies to	2.2+
Fixed tickets	-

form_customization
Preceding code lines are not related to what the code demonstrates: Twig blocks do not need to be defined in separate files; the file does not hold a form, so importing a theme is confusing

monolog
Standard Edition uses lowercase error value in config_prod.yml

[weaverryan]

I'm not sure about this - I believe the {% form_theme form _self %} is needed for this. But I agree that the filename is wrong - this could be any file and it is confusing. This may have been copied from the PHP example below it. So, I believe we should only remove line 669.

[bicpi]

@weaverryan I've added the "self" theming again, but also made it consistent with the preceding example, i.e. the axample outputs the form row at the end- as shown with the form widget before. The PHP example show both, the main template echoing the form row and the single PHP file that defines the row "block" - as shown in the wifget example before.

Along the way I've also fixes four lines with wrong PHP code that was mixed with Twig syntax.

[weaverryan]

Yep, big 👍 for this - very careful work Philipp :).

Thanks!