cf. http://www.gecode.org/doc-latest/reference/PageHowToChange__6.html

This removes tabs and spaces mix and make the readable again

http://www.gecode.org/doc-latest/reference/PageHowToChange__5.html
says that brancher handlers have been removed and that `BrancherGroup`
should be used instead.

use the `BrancherGroup:all` static member to get the special brancher
group that gathers all branchers in a space, and fetch the number of branchers
it contains.
cf. http://www.gecode.org/doc-latest/MPG.pdf

Do the same thing for propagators.

The former would select any Python 3 interpreter.

Closes #10058776.

This includes turning generative test into subtest, using standard api for
doctest and some use of bare unittest instead of lgc.testlib as bonus.

else we may run into problem when pkg_resources is used, as it will detect that
a dependancy in the python package isn't installed.

Fix it this way rather than using extras_require because we want the
package to be usable with a simple pip install.

Closes #9343431

Closes #9441457

closes #10041087

Since the binary will disappear in logilab-common 1.3.0.

Before this 'Machin 12' is transformed to 'Any 12' since it expect a 'set type
shortcut', but since the selection doesn't hold any variable, the type
information is lost and no type checking is ever done.

We can not expect to have the schema at this point, which would allow to check
if the type exists. Even if we had, we would then need dedicated structures to
hold the information that we expect entity with eid '12' to be a 'Machin'...

Thus, it seems simpler to disallow usage of this simplified form without any
selected variable.

Closes #9234282.

[__pkginfo__] use yapp2 in requires.txt since that is the one being installed by debian package (and also fits in pip install scenario)

our spec files conflict with filesystem package in centos7: we set permission
755 for /usr/bin and /usr/lib whereas filesystem set it to 555.

So to be compatible with both centos7 and others we simply ignore theses
directories.

pybuild doesn't seem to find any tests.  We should fix that, but, later.

when types are actually yams schema instead of bare string, one ended up with:

  File "/usr/lib/python2.7/dist-packages/rql/nodes.py", line 639, in get_type
    if lhstype == rhstype and not 'Date' in lhstype:
  TypeError: argument of type 'CubicWebEntitySchema' is not iterable

* add support for TZDatetime
* properly raise on unsupported addition (e.g. date+date)
* dates can be added to Interval, not Time

Closes #3248236

Capturing the latter only results in an empty StringIO.

The original patch for bug #1190458 broke tests in CubicWeb. The patch
has now been amended to fix the broken paths (namely, replacing the 'in'
tests with appropriate 'is_equivalent' loops).

These tests are adapted from CubicWeb's own test suite, especially those
that test FTIRANK() on sqlite (the function exists but is replaced by a
no-op).

Related to #1167312

Mostly in comments and defunct tools.
Related to #1167312