Commentary - Spelling fixes

src/V3Descope.cpp

@@ -136,7 +136,7 @@ private:
             m_needThis = true;
             return name+"->";
         } else {
-            // Reference to something elsewhere, or relative refences
+            // Reference to something elsewhere, or relative references
             // are disabled. Use global variable
             UINFO(8,"      Descope "<<scopep<<endl);
             UINFO(8,"           to "<<scopep->name()<<endl);