Add comment to 2137

Author: jwakely

xml/issue2137.xml

@@ -38,6 +38,15 @@ opening many issues in an ongoing process.
 </p>
 
 <note>2015-05-06 Lenexa: EricWF to write paper addressing 2136 and 2137</note>
+
+<note>2024-10-03; Jonathan comments</note>
+<p>
+I could find no other cases in the entire standard where we say something
+like this in a <i>Postconditions</i>: element.
+<sref ref="[streambuf.virt.pback]"/> p2 says
+"<i>Postconditions</i>: On return, the constraints of [...]"
+which is probably redundant (postconditions are always "on return").
+</p>
 </discussion>
 
 <resolution>