Merge pull request #9154 from mono/backport-pr-9151-to-release-8.4

[release-8.4] Bump Roslyn to 3.4.0-beta3-19525-13

Author: sandyarmstrong

main/msbuild/RoslynVersion.props

@@ -1,5 +1,5 @@
 <Project>
   <PropertyGroup>
-    <NuGetVersionRoslyn>3.4.0-beta3-19518-02</NuGetVersionRoslyn>
+    <NuGetVersionRoslyn>3.4.0-beta3-19525-13</NuGetVersionRoslyn>
   </PropertyGroup>
 </Project>

main/src/core/Mono.TextEditor.Shared/Mono.TextEditor/Document/TextDocument.cs

@@ -343,7 +343,7 @@ public TextDocument (string text = null, string fileName = null, string mimeType
 			this.mimeType = mimeType;
 			var doc = PlatformCatalog.Instance.TextDocumentFactoryService.CreateTextDocument (
 				PlatformCatalog.Instance.TextBufferFactoryService.CreateTextBuffer (
-					text ?? string.Empty,
+					new StringReader(text ?? string.Empty),
 					GetContentTypeFromMimeType (fileName, mimeType)
 				),
 				fileName ?? string.Empty

main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Gui.Documents/TextBufferFileModel.cs

@@ -80,7 +80,7 @@ protected override async Task OnLoad ()
 						ThawChangeEvent ();
 					}
 				} else {
-					var buffer = PlatformCatalog.Instance.TextBufferFactoryService.CreateTextBuffer (text.Text, contentType);
+					var buffer = PlatformCatalog.Instance.TextBufferFactoryService.CreateTextBuffer (new System.IO.StringReader (text.Text), contentType);
 					var doc = PlatformCatalog.Instance.TextDocumentFactoryService.CreateTextDocument (buffer, FilePath);
 					doc.Encoding = text.Encoding;
 					SetTextDocument (doc);