Marcel Taeumel uploaded a new version of System to project The Trunk: http://source.squeak.org/trunk/System-mt.1188.mcz
==================== Summary ====================
Name: System-mt.1188 Author: mt Time: 4 November 2020, 11:50:14.56762 am UUID: 57645a78-976f-ed45-b29d-0a3263b10d3d Ancestors: System-mt.1187
Minor clean up and speed up.
=============== Diff against System-mt.1187 ===============
Item was changed: ----- Method: Preferences class>>setPreference:toValue:during: (in category 'get/set') ----- setPreference: prefSymbol toValue: anObject during: aBlock
+ | previousValue | + previousValue := self valueOfPreference: prefSymbol. + self setPreference: prefSymbol toValue: anObject. + ^ aBlock ensure: [self setPreference: prefSymbol toValue: previousValue]! - (self valueOfPreference: prefSymbol) in: [:previous | - self setPreference: prefSymbol toValue: anObject. - ^ aBlock ensure: [self setPreference: prefSymbol toValue: previous]]!