After seeing the post of Bert about ldexp
http://croquetweak.blogspot.fr/2014/08/deconstructing-floats-frexp-and-ldexp.html

I wanted to check what's in image.
But I realized that current Squeak fallback code for Float>>timesTwoPower:
is not OK.
It's the version from Etoys-Squeakland corresponding to old squeak
implementation

The correct one should be that of Kernel-nice.900.mcz
http://lists.squeakfoundation.org/pipermail/packages/2015-February/007538.html
Fortunately it has been moved (duplicated) in-between in both subclasses,
thus maybe the Squeakland one is not an override? I can't really trace what
happened because it's hidden in the spur transition.
But IMO it would be preferable to implement the Smalltalk one in Float only
once, and rely on ^super timesTwoPower: in case of primitive failure.

I saw some other instances of code that was fixed but reintroduced (like
all the character scanner duplication). What's the strategy about it, can
we touch Squeakland, or shall we refrain?
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