Include <description> when rendering lists

See dotnet/csharplang#1765

Author: sharwell

DocumentationAnalyzers/DocumentationAnalyzers.CodeFixes/RefactoringRules/DOC900CodeFixProvider+DocumentationCommentPrinter.cs

@@ -266,9 +266,9 @@ private static void BlocksToHtmlInner(DocumentationCommentTextWriter writer, Blo
 
                     case BlockTag.ListItem:
                         writer.EnsureLine();
-                        writer.WriteConstant("<item>");
+                        writer.WriteConstant("<item><description>");
 
-                        stackLiteral = "</item>";
+                        stackLiteral = "</description></item>";
                         stackTight = tight;
                         visitChildren = true;
                         break;

DocumentationAnalyzers/DocumentationAnalyzers.Test/RefactoringRules/DOC900UnitTests.cs

@@ -55,9 +55,9 @@ class TestClass { }
 ///$$ <summary>
 /// <para>Para 1</para>
 /// <list type=""bullet"">
-/// <item>Item 1</item>
-/// <item>Item 2</item>
-/// <item>Item 3</item>
+/// <item><description>Item 1</description></item>
+/// <item><description>Item 2</description></item>
+/// <item><description>Item 3</description></item>
 /// </list>
 /// </summary>
 class TestClass { }
@@ -83,9 +83,9 @@ class TestClass { }
 ///$$ <summary>
 /// <para>Para 1</para>
 /// <list type=""number"">
-/// <item>Item 1</item>
-/// <item>Item 2</item>
-/// <item>Item 3</item>
+/// <item><description>Item 1</description></item>
+/// <item><description>Item 2</description></item>
+/// <item><description>Item 3</description></item>
 /// </list>
 /// </summary>
 class TestClass { }