Incorrect short form for MeSH terms

[cthoyt]

This error originates on https://www.ebi.ac.uk/ols4/ontologies/mesh/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252Fmesh%2523C?lang=en

Note that the short form is mesh:mesh#C - this suggests there is a bug in the way short forms are generated. The correct short form here should be obo:mesh#C, because the PURL is http://obolibrary.org/obo/mesh#C, and the URI prefix for obo is http://obolibrary.org/obo/

For context, entities that are encoded like http://obolibrary.org/obo/<prefix>#<luid> are "default" references that get auto-assigned a URI when using the OBO Flat File Format, and are themselves pretty rampant throughout the OBOverse