bug#29866: 27.0.50; cl-loop: Calculate the array length just once

[Tino Calancha]

On Wed, 27 Dec 2017, Stefan Monnier wrote:

> > While studying this code I found easier to hack if we use gensym's
> > instead of make-symbol; otherwise, the code creates several symbols with
> > the same printed representation "--cl-var--".  For example, with current
> > code you can read expansions with something like:
>
> I always (setq print-gensym t print-circle t)
Thank you all for th eexplanations.
Wouldn't be those good defaults?  I don't see any advantage, rather than 
confusion for the current defaults.  I even replaced locally all those 
make-symbol with gensym to follow the expansions without get crazy.