`Markdown` view helper does not allow `null` for `text` argument

[Tom Udding]

Current behaviour

A lot of historical data of activities does not have correct localisation, as such null is always passed to

gewisweb/module/Application/src/View/Helper/Markdown.php

Lines 24 to 27 in 24d805e

 public function __invoke( 
     string $text, 
     bool $company = false, 
 ): string { 

This is not allowed and a 500 is returned.

Desired behaviour

Allow null and automatically change it to '' (empty string).

Steps to reproduce

https://gewis.nl/en/activity/view/2063

Website version

latest

What operating are you seeing the problem on?

No response

What browsers are you seeing the problem on?

No response

Other information

No response

[Tom Udding]

Perhaps it is actually better to change the LocaliseText view helper instead. Never have it return null but '' (empty string) instead.