From dff0dad48c3b3d8551e3b1e1e375a3d7c26cba1c Mon Sep 17 00:00:00 2001
From: "Vladislav Glagolev (DevExpress)" <vladislav.glagolev@devexpress.com>
Date: Tue, 27 Oct 2020 11:42:03 +0300
Subject: [PATCH] Add test

---
 YamlDotNet.Test/Core/EmitterTests.cs | 13 +++++++++++++
 YamlDotNet.Test/Yaml.cs              |  2 +-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/YamlDotNet.Test/Core/EmitterTests.cs b/YamlDotNet.Test/Core/EmitterTests.cs
index 277099577..d01d1ec50 100644
--- a/YamlDotNet.Test/Core/EmitterTests.cs
+++ b/YamlDotNet.Test/Core/EmitterTests.cs
@@ -208,6 +208,19 @@ public void FoldedStyleIsSelectedWhenNewLinesAreFoundInLiteral()
             yaml.Should().Contain(">");
         }
 
+
+        [Fact]
+        [Trait("motive", "pr #540")]
+        public void AllowBlockStyleInMultilineScalarsWithTrailingSpaces()
+        {
+            var events = SequenceWith(Scalar("hello  \nworld").ImplicitPlain);
+
+            var yaml = EmittedTextFrom(StreamedDocumentWith(events));
+
+            yaml.Should().Contain("\n");
+        }
+
+
         [Fact]
         public void FoldedStyleDoesNotGenerateExtraLineBreaks()
         {
diff --git a/YamlDotNet.Test/Yaml.cs b/YamlDotNet.Test/Yaml.cs
index cecae1e1a..f6363a9cd 100644
--- a/YamlDotNet.Test/Yaml.cs
+++ b/YamlDotNet.Test/Yaml.cs
@@ -103,7 +103,7 @@ public static string Text(string yamlText)
                 }
 
                 lines = lines
-                    .Select(l => l.Substring(indent.Groups[1].Length))
+                    .Select(l => l.Length > 0 ? l.Substring(indent.Groups[1].Length) : l)
                     .ToList();
             }