Add missing </p> for xml text reader (monodoc make dist)

svn path=/trunk/mcs/; revision=70485

mcs/errors/cs0188.xml

@@ -16,5 +16,6 @@
 		<p>See the ECMA 334 specification, section 18.3.8 for
 		details on the constructor differences between structs
 		and classes. 
+		</p>
         </Details>
 </ErrorDetails>