Nicolas Cellier uploaded a new version of System to project The Trunk:
http://source.squeak.org/trunk/System-ul.1227.mcz

==================== Summary ====================

Name: System-ul.1227
Author: ul
Time: 14 April 2021, 12:18:21.030941 pm
UUID: f2db8914-3046-4620-9c86-aa697acafff2
Ancestors: System-mt.1226

- do not modify the System package when generating preference accessors

=============== Diff against System-mt.1226 ===============

Item was changed:
  ----- Method: Preferences class>>compileAccessorForPreference: (in category 'private') -----
  compileAccessorForPreference: aPreference
  	"Compile an accessor method for the given preference"
  
  	self class 
  		compileSilently: (
  			'{1} ^self valueOfFlag: {2} ifAbsent: [ {3} ]'
  				format: {
  					aPreference name asString.
  					aPreference name asSymbol printString.
  					aPreference defaultValue storeString })
+ 		classified: '*autogenerated - standard queries'!
- 		classified: 'standard queries'!