Documentation: ERROR.trace is string not array()

[LeShrimp]

Hi there,

I found an error in the User Guide.

On https://fatfreeframework.com/3.9/framework-variables#AbouttheF3ErrorHandler it says:

ERROR.trace - stack trace stored in an array()

However, as the reference on https://fatfreeframework.com/3.9/quick-reference#SystemVariables correctly states, it is a string.

Caused a bit of confusion for me, so I thought it might be worth pointing out. ;)

Thanks for the great work! F3 is the most agreeable and useful framework I've had the pleasure to work with.

Kind regards
Maxime