Add a couple more XML doc comment tests on first and last line of buffer

src/EditorFeatures/CSharpTest/DocumentationComments/DocumentationCommentTests.cs

@@ -1398,6 +1398,36 @@ void M()
             VerifyOpenLineAbove(code, expected);
         }
 
+        [WorkItem(2090, "https://github.com/dotnet/roslyn/issues/2090")]
+        [Fact, Trait(Traits.Feature, Traits.Features.DocumentationComments)]
+        public void TestOpenLineAbove3()
+        {
+            const string code =
+@"class C
+{
+	/// $$<summary>
+    /// stuff
+    /// </summary>
+	void M()
+	{
+	}
+}";
+
+            const string expected =
+@"class C
+{
+    $$
+	/// <summary>
+    /// stuff
+    /// </summary>
+	void M()
+	{
+	}
+}";
+
+            VerifyOpenLineAbove(code, expected);
+        }
+
         [WorkItem(2090, "https://github.com/dotnet/roslyn/issues/2090")]
         [Fact, Trait(Traits.Feature, Traits.Features.DocumentationComments)]
         public void TestOpenLineBelow1()
@@ -1458,6 +1488,26 @@ void M()
             VerifyOpenLineBelow(code, expected);
         }
 
+        [WorkItem(2090, "https://github.com/dotnet/roslyn/issues/2090")]
+        [Fact, Trait(Traits.Feature, Traits.Features.DocumentationComments)]
+        public void TestOpenLineBelow3()
+        {
+            const string code =
+@"/// <summary>
+/// stuff
+/// $$</summary>
+";
+
+            const string expected =
+@"/// <summary>
+/// stuff
+/// </summary>
+/// $$
+";
+
+            VerifyOpenLineBelow(code, expected);
+        }
+
         protected override char DocumentationCommentCharacter
         {
             get { return '/'; }

src/EditorFeatures/VisualBasicTest/DocumentationComments/DocumentationCommentTests.vb

@@ -784,6 +784,31 @@ End Class
             VerifyOpenLineAbove(code, expected)
         End Sub
 
+        <WorkItem(2090, "https://github.com/dotnet/roslyn/issues/2090")>
+        <Fact, Trait(Traits.Feature, Traits.Features.DocumentationComments)>
+        Public Sub TestOpenLineAbove3()
+            Const code = "
+Class C
+	''' $$<summary>
+    ''' stuff
+    ''' </summary>
+	Sub M()
+    End Sub
+End Class
+"
+            Const expected = "
+Class C
+    $$
+	''' <summary>
+    ''' stuff
+    ''' </summary>
+	Sub M()
+    End Sub
+End Class
+"
+            VerifyOpenLineAbove(code, expected)
+        End Sub
+
         <WorkItem(2090, "https://github.com/dotnet/roslyn/issues/2090")>
         <Fact, Trait(Traits.Feature, Traits.Features.DocumentationComments)>
         Public Sub TestOpenLineBelow1()
@@ -834,6 +859,21 @@ End Class
             VerifyOpenLineBelow(code, expected)
         End Sub
 
+        <WorkItem(2090, "https://github.com/dotnet/roslyn/issues/2090")>
+        <Fact, Trait(Traits.Feature, Traits.Features.DocumentationComments)>
+        Public Sub TestOpenLineBelow3()
+            Const code = "
+''' <summary>
+''' stuff
+''' $$</summary>"
+            Const expected = "
+''' <summary>
+''' stuff
+''' </summary>
+''' $$"
+            VerifyOpenLineBelow(code, expected)
+        End Sub
+
         Friend Overrides Function CreateCommandHandler(
             waitIndicator As IWaitIndicator,
             undoHistoryRegistry As ITextUndoHistoryRegistry,