Collections has two head versions now: cmm-674 and cmm-675. The should be 
merged.

Levente

On Sun, 3 Jan 2016, commits at source.squeak.org wrote:

> Chris Muller uploaded a new version of Collections to project The Trunk:
> http://source.squeak.org/trunk/Collections-cmm.675.mcz
>
> ==================== Summary ====================
>
> Name: Collections-cmm.675
> Author: cmm
> Time: 3 January 2016, 3:33:44.302 pm
> UUID: d019e6cc-abbb-4077-9e3d-2f471f6fb07a
> Ancestors: Collections-eem.672
>
> grownBy: should answer the same class of object asked to be grown.
>
> =============== Diff against Collections-eem.672 ===============
>
> Item was changed:
>  ----- Method: SequenceableCollection>>grownBy: (in category 'copying') -----
> + grownBy: length
> - grownBy: length
>  	"Answer a copy of receiver collection with size grown by length"
> + 	^ (self class ofSize: self size + length)
> + 		replaceFrom: 1 to: self size with: self startingAt: 1 ;
> + 		yourself!
> -
> - 	| newCollection |
> - 	newCollection := self species ofSize: self size + length.
> - 	newCollection replaceFrom: 1 to: self size with: self startingAt: 1.
> - 	^ newCollection!
>
>
>