Correcting grammar.

llvm-svn: 143894

clang/lib/AST/ASTContext.cpp

@@ -2885,7 +2885,7 @@ static QualType getDecltypeForExpr(const Expr *e, const ASTContext &Context) {
 /// DecltypeType AST's. The only motivation to unique these nodes would be
 /// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be
 /// an issue. This doesn't effect the type checker, since it operates
-/// on canonical type's (which are always unique).
+/// on canonical types (which are always unique).
 QualType ASTContext::getDecltypeType(Expr *e) const {
   DecltypeType *dt;