Add CRLF support

Author: Arlodotexe

src/Blog/Page/HtmlTemplatedMarkdownFile.cs

@@ -140,8 +140,10 @@ private async Task<string> GenerateHtmlAsync(CancellationToken cancellationToken
                 return (string.Empty, text);
             }
 
-            // Find the closing delimiter
-            var lines = text.Split(new[] { '\r', '\n' }, StringSplitOptions.None);
+            // Find the closing delimiter. Split on whole newline sequences so CRLF input
+            // doesn't create blank lines between every Markdown line.
+            var lines = text.Split(new[] { "\r\n", "\n", "\r" }, StringSplitOptions.None);
+
             var closingDelimiterIndex = -1;
 
             for (int i = 1; i < lines.Length; i++)
@@ -187,6 +189,7 @@ protected virtual string TransformMarkdownToHtml(string markdown)
             return Markdown.ToHtml(markdown, pipeline);
         }
 
+
         /// <summary>
         /// Parse YAML front-matter string to arbitrary dictionary.
         /// No schema enforcement - accepts any valid YAML structure.
@@ -276,4 +279,4 @@ protected virtual async Task<string> RenderTemplateAsync(IFile templateFile, Htm
             return template.Render(model);
         }
     }
-}
+}