1 internet doctest failing in combinat/species/library.py + combinat/tutorial.py

[seblabbe]

With SageMath version 9.2.beta2, Release Date: 2020-06-26, the command

sage -t --optional=sage,internet src/sage/combinat/species/library.py src/sage/combinat/tutorial.py

gives

Doctesting 2 files.
sage -t src/sage/combinat/species/library.py
**********************************************************************
File "src/sage/combinat/species/library.py", line 104, in sage.combinat.species.library.BinaryTreeSpecies
Failed example:
    oeis(seq)[0]                              # optional -- internet
Expected:
    A000108: Catalan numbers: C(n) = binomial(2n,n)/(n+1) = (2n)!/(n!(n+1)!). Also called Segner numbers.
Got:
    A000108: Catalan numbers: C(n) = binomial(2n,n)/(n+1) = (2n)!/(n!(n+1)!).
**********************************************************************
1 item had failures:
   1 of  10 in sage.combinat.species.library.BinaryTreeSpecies
    [23 tests, 1 failure, 3.88 s]
sage -t src/sage/combinat/tutorial.py
**********************************************************************
File "src/sage/combinat/tutorial.py", line 224, in sage.combinat.tutorial
Failed example:
    oeis([1,1,2,5,14])                            # optional -- internet
Expected:
    0: A000108: Catalan numbers: C(n) = binomial(2n,n)/(n+1) = (2n)!/(n!(n+1)!). Also called Segner numbers.
    1: ...
    2: ...
Got:
    0: A000108: Catalan numbers: C(n) = binomial(2n,n)/(n+1) = (2n)!/(n!(n+1)!).
    1: A022562: Number of connected claw-free unlabeled graphs on n nodes.
    2: A124302: Number of set partitions with at most 3 blocks; number of Dyck paths of height at most 4; dimension of space of symmetric polynomials in 3 noncommuting variables.
**********************************************************************
1 item had failures:
   1 of 245 in sage.combinat.tutorial
    [244 tests, 1 failure, 6.98 s]
----------------------------------------------------------------------
sage -t src/sage/combinat/species/library.py  # 1 doctest failed
sage -t src/sage/combinat/tutorial.py  # 1 doctest failed
----------------------------------------------------------------------

Component: combinatorics

Author: Sébastien Labbé

Branch/Commit: 9b13210

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/30020

[seblabbe]

comment:2

removing beaver failing doctest, because it was already dealt in #29787

[seblabbe]

Author: Sébastien Labbé

[seblabbe]

Commit: cdfc3cd

[seblabbe]

New commits:

cdfc3cd

30020: fixing doctests depending on OEIS (Catalan numbers)

[seblabbe]

Branch: u/slabbe/30020

[tscrim]

comment:4

It might be good to adopt a similar strategy to #29787 and add some ... to hopefully make sure this doesn't happen again from other OEIS changes.

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

9b13210

30020: making doctests more robust after reviewer comment

[sagetrac-git]

Changed commit from cdfc3cd to 9b13210

[seblabbe]

comment:6

Ok, I think this is now more robust.

[tscrim]

comment:7

Thanks. LGTM.

[tscrim]

Reviewer: Travis Scrimshaw

[vbraun]

Changed branch from u/slabbe/30020 to 9b13210