[Newbies] BUG in keyboard sequence for commenting region ?

[Nicola Mingotti]

Hi,

I am using Squeak5.2, in MacOS.

According to Help -> Keyboard Shortcut:
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Ctrl-'	Toggle enclosure within double-quotes
Cmd-'	Toggle enclosure within single-quotes
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Neither of those works. The only way to make a selected part of text commented is to press Shift+' . This sequence does not toggle, it just quotes the region.

I may have installed a nasty package because I am pretty sure I was able to comment/uncomment regions a few days ago. 

Do you observe the same behavior ? 

Post Scriptum: Can you tell me where this is implemented and save me X hours of digging ? :) I would like to change it a bit. 

Bye
Nicola