Fixed ascii art for CrystalOfTableaux.
Merge branch 'public/combinat/tableaux_ascii_art-16487' into public/crystals/ascii_art_tableaux-16486
Merge branch 'public/combinat/tableaux_ascii_art-16487' into public/crystals/ascii_art_tableaux-16486
Make "sage -t --warn-long" a warning, not an error

The option says warn, so don't make it a hard failure. Also, some
doctest examples testing invalid input were not time stamped because
they raised an exception at the compile stage already.
trac #12844 cleanup of doc in plot3d
trac #16720: Speedup for OA_from_quasi_difference_matrix
Enable --warn-long by default
fix cmdline doctest that depends on warn-long
update documentation
Merge branch 'develop' into t/16609/doctest_limits
fix more doctesting framework doctests
add --warn-long to the command line help
trac #16720: Merged with 6.3.rc1
trac #16720: A clearer line
Merge branch 'u/chapoton/12844' of ssh://trac.sagemath.org:22/sage into 12844
trac #12844 better description of color keyword
12844 reviewer's patch: fix doc compile, typo
Trac #16292: Implement is_simply_laced() for CartanMatrix and a default folding for type A1 affine

Because it's good to have a direct check on the Cartan matrix and
because type A,,1,,^(1)^ is not simply-laced.

URL: http://trac.sagemath.org/16292
Reported by: tscrim
Ticket author(s): Travis Scrimshaw
Reviewer(s): Ben Salisbury
Trac #16324: Implement crystal of rigged configurations

URL: http://trac.sagemath.org/16324
Reported by: tscrim
Ticket author(s): Travis Scrimshaw
Reviewer(s): Ben Salisbury
Trac #16609: Warn about overly long doctests

This ticket aims to raise awareness for slow doctests. Some are very
time consuming just because the author wants to show off the
capabilities of their code, and will sooner or later hurt our ability to
run the testsuite. Really, doctests should be as fast as possible while
providing adequate coverage.
* Make the `--warn-long` option a warning
* Enable it by default (with 60s time limit)

URL: http://trac.sagemath.org/16609
Reported by: vbraun
Ticket author(s): Volker Braun
Reviewer(s): Punarbasu Purkayastha