Settings.m assigment failures, e.g. Settings`$S

[rocky]

Consider:

$ mathicsscript
Set::setraw: Cannot assign to raw object inkpot.

Mathicscript: 5.1.0.dev0, Mathics 5.0.3dev0
...

Investigating a little shows that autoloading mathicsscript/mathicsscript/autoload/settings.m fails in settings assignment.

In particular

Settings`$PygmentsStyle::usage = "This variable..."

when autoloaded produces:

Set::setraw: Cannot assign to raw object inkpot.

Note that "inkpot" is the the value of Settings`$PygmentsStyle.

[rocky]

@mmatera is this related to assignment changes? Order of loading changes? Change in the way mathicsscript sets a value for Settings`$PygmentsStyle?