Fix a typo in the comments

Author: markuswntr

Sources/ComplexModule/ElementaryFunctions.swift

@@ -33,7 +33,7 @@
 // adapted from Kahan's 1986 paper "Branch Cuts for Complex Elementary
 // Functions; or: Much Ado About Nothing's Sign Bit".
 //
-// As quaternions share the same goals and use adoptions of the elementary
+// As quaternions share the same goals and use adaptations of the elementary
 // functions: If you make a modification to either of the following functions,
 // you should almost surely make a parallel modification to the same elementary
 // function of quaternions (See ElementaryFunctions.swift in QuaternionModule).

Sources/QuaternionModule/ElementaryFunctions.swift

@@ -12,7 +12,7 @@
 
 import RealModule
 
-// As the following elementary functions algorithms are adoptions of the
+// As the following elementary functions algorithms are adaptations of the
 // elementary functions of complex numbers: If you make a modification to either
 // of the following functions, you should almost surely make a parallel
 // modification to the same elementary function of complex numbers (See