finish migration class

Update.php

@@ -48,12 +48,12 @@ class Update
         $setClause = implode(", ", $setParts);
 
         // FINAL SQL STATEMENT
-        $sqlStatement = "UPDATE $table SET $setClause";
+        $update = "UPDATE $table SET $setClause";
         if($this->isConditioned()) {
             $whereClause = $this->combineConditions();
-            $sqlStatement .= " WHERE $whereClause";
+            $update .= " WHERE $whereClause";
         }
-        return esc_sql($sqlStatement);
+        return $update;
     }
 
     /**