Fix typo

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@139128 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/AST/Decl.h

@@ -1965,7 +1965,7 @@ public:
   /// specialization or a member of a class template specialization.
   ///
   /// \returns the first point of instantiation, if this function was 
-  /// instantiated from a template; otherwie, returns an invalid source 
+  /// instantiated from a template; otherwise, returns an invalid source 
   /// location.
   SourceLocation getPointOfInstantiation() const;