K5_2 signature change

[kiwifb]

I'll ask here before going to open an issue with sagemath. After the update to 2024.5.1 in sagemath it seems the tested signature has changed

File "/usr/lib/python3.12/site-packages/sage/knots/knotinfo.py", line 898, in sage.knots.knotinfo.KnotInfoBase.signature
Failed example:
    KnotInfo.K5_2.signature()       # optional - database_knotinfo
Expected:
    1
Got:
    -2

Trying with 2024.8.1 gives the same result (-2). I find it strange that the property of a particular knot would change like that. Was the doctest always wrong, or was there something wrong in the database or is something fishy going on?

[soehms]

Was the doctest always wrong, or was there something wrong in the database or is something fishy going on?

No! The doctest didn' work before sagemath/sage#38118 which has been merged currently. In that PR the doctest has been made working but with a wrong result. This will be fixed with sagemath/sage#38254.

[kiwifb]

Was always wrong. I feel better about that now. Good to see there is work to fix it.