Collapses whitespace and strips trailing "Mutation"/"Mut" suffixes used by clinicians documenting variants in free text.
See also
Other alteration:
zhn_alteration_type(),
zhn_is_mutation()
Examples
zhn_normalize_alteration(c("TP53 Mutation", " NRAS Mut", "del(17p)"))
#> [1] "TP53" "NRAS" "del(17p)"