feat: remove any blank lines after documentation comments (#1526)

closes #1521

Author: belav

Src/CSharpier.Tests/CSharpier.Tests.csproj

@@ -36,7 +36,4 @@
       <DependentUpon>$([System.String]::Copy(%(Filename)).Replace('.expected', '.test'))</DependentUpon>
     </Content>
   </ItemGroup>
-  <ItemGroup>
-    <Folder Include="FormattingTests\TestFiles\csproj\" />
-  </ItemGroup>
 </Project>

Src/CSharpier.Tests/FormattingTests/TestFiles/cs/Comments_RemoveLinesAfterDocumentation.expected.test

@@ -0,0 +1,13 @@
+public class ClassName
+{
+    /// <summary>Remove the lines after the summary</summary>
+    public bool SomeField1;
+
+    /* Don't remove this line */
+
+    public bool SomeField2;
+
+    // Don't remove this line
+
+    public bool SomeField2;
+}

Src/CSharpier.Tests/FormattingTests/TestFiles/cs/Comments_RemoveLinesAfterDocumentation.test

@@ -0,0 +1,14 @@
+public class ClassName
+{
+    /// <summary>Remove the lines after the summary</summary>
+
+    public bool SomeField1;
+
+    /* Don't remove this line */
+
+    public bool SomeField2;
+
+    // Don't remove this line
+
+    public bool SomeField2;
+}

Src/CSharpier/SyntaxPrinter/Token.cs

@@ -250,7 +250,17 @@ private static Doc PrivatePrintLeadingTrivia(
                 {
                     printNewLines = false;
                 }
-                docs.Add(Doc.HardLineSkipBreakIfFirstInGroup);
+
+                if (
+                    !(
+                        docs.Count > 1
+                        && docs[^1] == Doc.HardLineSkipBreakIfFirstInGroup
+                        && docs[^2] is LeadingComment { Type: CommentType.SingleLine }
+                    )
+                )
+                {
+                    docs.Add(Doc.HardLineSkipBreakIfFirstInGroup);
+                }
             }
             if (kind is not (SyntaxKind.EndOfLineTrivia or SyntaxKind.WhitespaceTrivia))
             {