The text on my wordpress text editor is white on a white background so its invisible for most people.. 

[![enter image description here](https://i.stack.imgur.com/7445a.png)](https://i.stack.imgur.com/7445a.png)

I searched it and the solution I found was to add the following code to wp-config.php 

```
define('CONCATENATE_SCRIPTS', false );

```

It worked fine but I couldn't find what it does or why it works.

I only found a question that asks the same thing [here](https://wordpress.org/support/topic/why-do-i-have-to-add-defineconcatenate_scripts-false) but it didn't get an answer.

**Could someone explain what the code above does and why it works?**