fix: 🐛 fix break lines issue in markdown parser

src/BuildingBlocks/SpectreConsole/Markdown/SpectreHorizontalCompositeRenderable.cs

@@ -0,0 +1,15 @@
+using Spectre.Console;
+using Spectre.Console.Rendering;
+
+namespace BuildingBlocks.SpectreConsole.Markdown;
+
+//  Stacking elements vertically or adding multiple horizontal rows without extra space
+internal class SpectreHorizontalCompositeRenderable(IEnumerable<IRenderable> renderablesElements) : Renderable
+{
+    protected override IEnumerable<Segment> Render(RenderOptions options, int maxWidth)
+    {
+        // Use Rows to combine renderables items in multiple horizontal rows without extra space
+        IRenderable rows = new Rows(renderablesElements);
+        return rows.Render(options, maxWidth);
+    }
+}

src/BuildingBlocks/SpectreConsole/Markdown/SpectreMarkdownBlockRendering.cs

@@ -66,8 +66,12 @@
 
     private IRenderable AppendBreakAfter(IRenderable renderable)
     {
+        //  // or using SpectreHorizontalCompositeRenderable
+        // return new SpectreHorizontalCompositeRenderable(new List<IRenderable> { renderable, new Text(string.Empty) });
+
         return new SpectreVerticalCompositeRenderable(
-            new List<IRenderable> { renderable, new Text(Environment.NewLine) }
+            //  break current line with `\n` and create a empty line with `NewLine`
+            new List<IRenderable> { renderable, new Text("\n"), new Text(Environment.NewLine) }
         );
     }
 
@@ -81,7 +85,13 @@
     private IRenderable AppendBreakBeforeAfter(IRenderable renderable)
     {
         return new SpectreVerticalCompositeRenderable(
-            new List<IRenderable> { new Text(Environment.NewLine), renderable, new Text(Environment.NewLine) }
+            new List<IRenderable>
+            {
+                new Text(Environment.NewLine),
+                renderable,
+                new Text("\n"),
+                new Text(Environment.NewLine),
+            }
         );
     }
 
@@ -255,7 +265,7 @@
         bool suppressNewLine = false
     )
     {
         var text = _inlineRendering.RenderContainerInline(paragraphBlock.Inline, style, alignment: alignment);
 
         return suppressNewLine ? text : AppendBreakAfter(text);
     }

src/BuildingBlocks/SpectreConsole/Markdown/SpectreVerticalCompositeRenderable.cs

@@ -1,4 +1,3 @@
-using Spectre.Console;
 using Spectre.Console.Rendering;
 
 namespace BuildingBlocks.SpectreConsole.Markdown;
@@ -10,14 +9,3 @@ protected override IEnumerable<Segment> Render(RenderOptions options, int maxWid
         return renderables.SelectMany(x => x.Render(options, maxWidth));
     }
 }
-
-//  Stacking elements vertically or adding multiple horizontal rows without extra space
-internal class SpectreHorizontalCompositeRenderable(IEnumerable<IRenderable> renderablesElements) : Renderable
-{
-    protected override IEnumerable<Segment> Render(RenderOptions options, int maxWidth)
-    {
-        // Use Rows to combine renderables items in multiple horizontal rows without extra space
-        IRenderable rows = new Rows(renderablesElements);
-        return rows.Render(options, maxWidth);
-    }
-}

tests/UnitTests/BuildingBlocks.UnitTests/SpectreConsole/Markdown/SpectreMarkdownTests.cs

@@ -36,13 +36,11 @@ public void Test2()
     public void Test3()
     {
         var s = new SpectreMarkdown(
-            @"To add a method overload to the `Add` class, we need to modify the `Add` class in the `Models/Add.cs` file. Since the current context does not provide the full implementation of the `Add` class, I will assume a basic structure and add an overloaded method.
+            @"method.
 
 Here's the updated code:
 
-Update: Models/Add.cs
-```csharp
-namespace Calculator;"
+Update: Models/Add.cs"
         );
         AnsiConsole.Write(s);
     }