non-ascii characters in ontology mapping file

[sheridancbio]

Looking at the ontology code mapping file using the github browser: https://github.com/cBioPortal/oncotree/blob/master/scripts/ontology_to_ontology_mapping_tool/ontology_mappings.txt

there appears to be unexpected characters for the record for oncotree code GBASC in the NCIT column. This should be checked and probably corrected.