17073: added link to Sets.SubcategoryMethods.Facade
17073: more progressive introduction to facade sets and improved cross links; also deprecated Sets.Facades
17073: added example comparing explicitly the facade and non facade situations
17073: suggestion to look at the code of the examples
Make sure that the vector space is not garbage collected before _repr_
Merge branch 'develop = 6.4 beta6' into t/17073/documentation_for_facade_sets
17073: Fixed old Sets.Facades to Sets.Facade
Trac #17073: Documentation for Facade Sets

Nicolas,

I documented two `Poset` functions in #17051 which have a `facade`
boolean argument (the same that `Poset()` has) and added a link toward
the `Facade` module. The problem is that there is no documentation there
to find, and it would help if you could write something to say to the
new users what they need to know about `Facade` in such situations.

This page is also the page that appears first when you type "sage
facade" in google.

Thanks.

Nathann

URL: http://trac.sagemath.org/17073
Reported by: ncohen
Ticket author(s): Nicolas M. Thiéry
Reviewer(s): Jori Mäntysalo
Trac #17103: Random failure in coercion/index.rst

Somebody needs to hold a reference to `QQ^2` here
{{{
File "src/doc/en/reference/coercion/index.rst", line 300, in
doc.en.reference.coercion.index
Failed example:
    (QQ^2).get_action(QQ)
Expected:
    Right scalar multiplication by Rational Field on Vector space of
dimension 2 over Rational Field
Got:
    <repr(<sage.structure.coerce_actions.RightModuleAction at
0x7fe782827628>) failed: RuntimeError: This action acted on a set that
became garbage collected>
**********************************************************************
1 item had failures:
   1 of  98 in doc.en.reference.coercion.index
}}}

URL: http://trac.sagemath.org/17103
Reported by: vbraun
Ticket author(s): Volker Braun
Reviewer(s): Jeroen Demeyer