Fix grammaro

dosp-survey.ltx

@@ -136,7 +136,7 @@ the most important are:
 
   \item When DOSP is introduced into a previously fully Open Source
     project, by the majority copyright holder, under what
-    circumstances does this tend to cause a viable fork occur?
+    circumstances does this tend to cause a viable fork to occur?
     % [ref:091db178]
 
 \end{itemize}