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From #1067, there is a bit of ambiguity in the handling of config file with vector input and multiple consecutive parameters. For example ```toml option1=[3,4,5] option1=[4,5,6] ``` Currently this is handled as if it were ```toml option1=[3,4,5,4,5,6] ``` But this could be confusing in the case where the input was referring to a vector of vectors. This PR adds a separator in the sequence to separate the vector so they are two vectors of 3 elements each. Will need to verify if this change has other side effects. It is a pretty unusual situation. --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>