Commentary - Spelling fixes

src/V3WidthSel.cpp

@@ -486,7 +486,7 @@ private:
     }
 
 public:
-    // CONSTUCTORS
+    // CONSTRUCTORS
     WidthSelVisitor() {}
     AstNode* mainAcceptEdit(AstNode* nodep) {
         return iterateSubtreeReturnEdits(nodep);