Eliot Miranda uploaded a new version of Kernel to project The Trunk:
http://source.squeak.org/trunk/Kernel-eem.898.mcz

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

Name: Kernel-eem.898
Author: eem
Time: 2 February 2015, 1:54:44.676 pm
UUID: ee76d58d-255c-464c-aa5e-0b88a264907c
Ancestors: Kernel-mt.897

Use the brace construct in becomeForward:.  Relax
the comment in the become implementations to
include Spur immediates.

=============== Diff against Kernel-mt.897 ===============

Item was changed:
  ----- Method: ProtoObject>>become: (in category 'system primitives') -----
  become: otherObject 
  	"Primitive. Swap the object pointers of the receiver and the argument.
+ 	 All variables in the entire system that used to point to the receiver
+ 	 now point to the argument, and vice-versa.
+ 	 Fails if either object is an immediate such as a SmallInteger."
- 	All variables in the entire system that used to point to the 
- 	receiver now point to the argument, and vice-versa.
- 	Fails if either object is a SmallInteger"
  
  	{self} elementsExchangeIdentityWith: {otherObject}!

Item was changed:
  ----- Method: ProtoObject>>becomeForward: (in category 'system primitives') -----
  becomeForward: otherObject 
  	"Primitive. All variables in the entire system that used to point
+ 	 to the receiver now point to the argument.
+ 	 Fails if either argument is an immediate such as a SmallInteger."
- 	to the receiver now point to the argument.
- 	Fails if either argument is a SmallInteger."
  
+ 	{self} elementsForwardIdentityTo: {otherObject}!
- 	(Array with: self)
- 		elementsForwardIdentityTo:
- 			(Array with: otherObject)!

Item was changed:
  ----- Method: ProtoObject>>becomeForward:copyHash: (in category 'system primitives') -----
  becomeForward: otherObject copyHash: copyHash
+ 	"Primitive. All variables in the entire system that used to point to
+ 	 the receiver now point to the argument. If copyHash is true, the
+ 	 argument's identity hash bits will be set to those of the receiver.
+ 	 Fails if either argument is an immediate such as a SmallInteger."
- 	"Primitive. All variables in the entire system that used to point to the receiver now point to the argument.
- 	If copyHash is true, the argument's identity hash bits will be set to those of the receiver.
- 	Fails if either argument is a SmallInteger."
  
+ 	{self}
+ 		elementsForwardIdentityTo: {otherObject}
+ 		copyHash: copyHash!
- 	(Array with: self)
- 		elementsForwardIdentityTo:
- 			(Array with: otherObject)
- 				copyHash: copyHash!