[expos.only.entity] Say typedef-names are declared

Author: frederick-vs-ja

source/lib-intro.tex

@@ -491,8 +491,8 @@
 
 \pnum
 Several entities and \grammarterm{typedef-name}{s}
-defined in \ref{\firstlibchapter} through \ref{\lastlibchapter} and \ref{depr}
-are only defined for the purpose of exposition.
+declared in \ref{\firstlibchapter} through \ref{\lastlibchapter} and \ref{depr}
+are only declared for the purpose of exposition.
 The declaration of such an entity or \grammarterm{typedef-name}
 is followed by a comment ending in \expos.