I thought we agreed not to integrate this. See 
http://forum.world.st/The-Trunk-Collections-topa-806-mcz-td5084658.html

Levente

On Wed, 13 Feb 2019, commits at source.squeak.org wrote:

> Nicolas Cellier uploaded a new version of Collections to project The Trunk:
> http://source.squeak.org/trunk/Collections-topa.806.mcz
>
> ==================== Summary ====================
>
> Name: Collections-topa.806
> Author: topa
> Time: 12 September 2018, 3:28:40.687052 pm
> UUID: 46b95db5-a773-4113-92f0-5ee905404b49
> Ancestors: Collections-cmm.805
>
> Fix separators to include U+00A0 (no break space)
>
> Thanks Ron!
>
> =============== Diff against Collections-cmm.805 ===============
>
> Item was changed:
>  ----- Method: Character class>>separators (in category 'instance creation') -----
>  separators
> + 	"Answer a collection of space-like separator characters.
> + 	Note that we do not consider spaces in >8bit code points yet.
> + 	"
> - 	"Answer a collection of the standard ASCII separator characters."
> 
> + 	^ #(9 "tab"
> - 	^ #(32 "space"
> - 		13 "cr"
> - 		9 "tab"
>  		10 "line feed"
> + 		12 "form feed"
> + 		13 "cr"
> + 		32 "space"
> + 		160 "non-breaking space, see Unicode Z general category")
> + 		collect: [:v | Character value: v] as: String
> + " To be considered:
> + 16r1680 OGHAM SPACE MARK
> + 16r2000 EN QUAD
> + 16r2001 EM QUAD
> + 16r2002 EN SPACE
> + 16r2003 EM SPACE
> + 16r2004 THREE-PER-EM SPACE
> + 16r2005 FOUR-PER-EM SPACE
> + 16r2006 SIX-PER-EM SPACE
> + 16r2007 FIGURE SPACE
> + 16r2008 PUNCTUATION SPACE
> + 16r2009 THIN SPACE
> + 16r200A HAIR SPACE
> + 16r2028 LINE SEPARATOR
> + 16r2029 PARAGRAPH SEPARATOR
> + 16r202F NARROW NO-BREAK SPACE
> + 16r205F MEDIUM MATHEMATICAL SPACE
> + 16r3000 IDEOGRAPHIC SPACE
> + "!
> - 		12 "form feed")
> - 		collect: [:v | Character value: v] as: String!
>
> Item was changed:
> + (PackageInfo named: 'Collections') postscript: 'CharacterSet cleanUp: false.'!
> - (PackageInfo named: 'Collections') postscript: 'Character initializeClassificationTable'!