A new version of Tools was added to project The Inbox:
http://source.squeak.org/inbox/Tools-jr.956.mcz

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

Name: Tools-jr.956
Author: jr
Time: 12 April 2020, 11:34:11.853623 am
UUID: 9950af65-dcd6-3a42-923b-8f174474ce8f
Ancestors: Tools-mt.955

Name arguments in debugger-generated methods 'aBlock' if they are bound to a block

=============== Diff against Tools-mt.955 ===============

Item was added:
+ ----- Method: BlockClosure>>canonicalArgumentName (in category '*Tools-Debugger') -----
+ canonicalArgumentName
+ 	^ 'Block'!