Fix missing remarks to namespace pages.

Author: Layoric

markdowngen/Program.cs

@@ -219,7 +219,7 @@ void Do(string type, string header)
                 foreach (var item1 in @where.OrderBy(i => i.Name))
                 {
                     str.AppendLine($"### {items.Link(item1.Uid, config, true)}");
-                    str.AppendLine(item.GetSummary(items,item1.Summary)?.Trim());
+                    str.AppendLine(item1.GetSummary(items,item1.Summary)?.Trim());
                 }
             }
         }