probs arg ignored if openmc.stats.Normal passed to openmc.stats.combine_distributions

[shimwell]

when making use of openmc.stats.combine_distributions the type hint indicate that probs can be a Sequence[Univariate] but the doc string only mentions openmc.stats.Discrete and openmc.stats.Tabular.

Passing in two openmc.stats.Normal does not raise any errors and returns a Mixture. However the probabilities of the Mixture are set to 1. ,1. even if the users specifies [0.3,0.8]

minimal example

import openmc
norm1=openmc.stats.Normal(mean_value=10, std_dev=1)
norm2=openmc.stats.Normal(mean_value=1, std_dev=1)
combo=openmc.stats.combine_distributions([norm1,norm2],probs=[0.1,0.9])
combo.probability
>>> [1.0, 1.0]