Make sure to flush any remaining text in the FlowedToText converter

Fixes issue #1130

Author: jstedfast

MimeKit/Text/FlowedToText.cs

@@ -171,6 +171,13 @@ public override void Convert (TextReader reader, TextWriter writer)
 				}
 			}
 
+			// Flush any remaining paragraph text.
+			if (para.Length > 0) {
+				if (paraQuoteDepth > 0)
+					writer.Write (new string ('>', paraQuoteDepth) + " ");
+				writer.Write (para);
+			}
+
 			if (!string.IsNullOrEmpty (Footer))
 				writer.Write (Footer);
 		}

UnitTests/MimeMessageTests.cs

@@ -29,6 +29,7 @@
 using System.Reflection;
 
 using MimeKit;
+using MimeKit.Text;
 using MimeKit.Utils;
 using MimeKit.Cryptography;
 
@@ -1562,6 +1563,19 @@ public void TestHtmlAndTextBodies ()
 			Assert.That (message.HtmlBody, Is.EqualTo (HtmlBody), "The HTML bodies do not match for body.9.txt.");
 		}
 
+		[Test]
+		public void TestFlowedTextBodyIssue1130 ()
+		{
+			const string TextBody = "We should have access, and apparently did a few months ago, but now there isa \"You do not currently have access to this content.\" at the bottom of therecord\n\nThe URL in question URL:\nhttps://example.com/";
+			MimeMessage message;
+
+			message = MimeMessage.Load (Path.Combine (TestHelper.ProjectDir, "TestData", "messages", "issue1130.txt"));
+
+			var body = message.GetTextBody (TextFormat.Flowed).Replace ("\r\n", "\n");
+
+			Assert.That (body, Is.EqualTo (TextBody), "The text bodies do not match for issue1130.txt.");
+		}
+
 		[Test]
 		public void TestNoBodyWithTextAttachment ()
 		{

UnitTests/TestData/messages/issue1130.txt

@@ -0,0 +1,16 @@
+From: MimeKit UnitTests <[email protected]>
+To: MimeKit UnitTests <[email protected]>
+Subject: Test of text body with format=flowed; delsp=yes
+Date: Thu, 09 Jan 2025 10:26:14 -0500
+MIME-Version: 1.0
+Content-Type: text/plain; format=flowed; delsp=yes; charset="iso-8859-1"
+Content-Transfer-Encoding: quoted-printable
+
+We should have access, and apparently did a few months ago, but now there i=
+s=20
+a "You do not currently have access to this content." at the bottom of the=
+=20
+record
+
+The URL in question URL:
+https://example.com/=20