fixup: missed edit in [basic.lookup.general]

Author: jensmaurer

source/basic.tex

@@ -1721,7 +1721,7 @@
 only declarations of
 types and templates whose specializations are types are considered;
 furthermore, if declarations
-of a type alias and of the type to which it refers are found,
+of a type alias and of its underlying entity are found,
 the declaration of the type alias is discarded
 instead of the type declaration.