Fix typo

Author: sarcanon

guidelines/xml/idx-persons.xml

@@ -38,9 +38,9 @@ End license statement: do not remove -->
         </specList>
     </p>
 
-    <p>When person-referencess and/or individual names are tagged in the epigraphic text
+    <p>When references to persons and/or individual names are tagged in the epigraphic text
         (see under <ref target="idx-persnames.html">Personal names</ref>)
-        it may also be useful to maintain an authority of names or persons (onomasticon or prosopography),
+        it may also be useful to maintain an authority list of names or persons (onomasticon or prosopography),
         either in TEI or in <ref target="idx-nontei.html">an external database format</ref>.</p>