Potential issue in variantmapper get_altered_sequence

[tedil]

In our rust version of hgvs, I stumbled upon cases where the interval requested in get_altered_sequence does not agree with the location range in the variant description.
However, I suspect that this is due to upstream logic or some missing update of the variant object instance
See varfish-org/hgvs-rs#225 for a slightly more thorough explanation.

(I will provide additional information later, i.e. how to reproduce etc)