Revert "-- Fixed typo in constitution."

This reverts commit 14fdc8b71c.

Any change to the constitution, even a typo fix, must be approved by the
membership in accordance with the text of the constitution, since it does not
provide any other way to correct typos.

about/constitution.xml

@@ -310,7 +310,7 @@
       Executive Council, by the Faculty Advisor, or by any ten (10) members.</li>
 
     <li> All members shall be notified at least two days prior to a forthcoming
-      meeting and of the business to be considered at that
+      meeting of the meeting and of the business to be considered at that
       meeting. A message to the members' mailing list will be considered
       sufficient notification, though other forms of notification are also
       encouraged.</li>