spelling for "Invalid fusion descriptor"

Issue #7 resolved
Former user created an issue

This is nit-picky but for the error given when the name "6,6-dimethyl-4-morpholino-2-(1H-pyrrolo[2,3-b]pyridin-5-yl)-8,9-dihydro-6H-[1,4]oxazino[3,4-e]purine" is given the error reads: "Invalid fusion descriptor: Heteroatom placement is ambigous as it is not present in both components of the fusion"

The word ambigous should be ambiguous.