Exclude matching \r\n (#5111)

When generating docs locally I noticed that some of the callouts only
included a newline and were missing the carriage return. Upon
investigation, I found that the regex used for callout replacement was
catching and removing the \r character.

This change fixes the two places such replacement may occur and ensures
we stop matching before the \r\n.

Author: stevejgordon

src/DocGenerator/AsciiDoc/GeneratedAsciidocVisitor.cs

@@ -198,7 +198,7 @@ public override void VisitSource(Source source)
 
 			// Replace tabs with spaces and remove C# comment escaping from callouts
 			// (elastic docs generation does not like this callout format)
-			source.Text = Regex.Replace(source.Text.Replace("\t", "    "), @"//[ \t]*\<(\d+)\>.*", "<$1>");
+			source.Text = Regex.Replace(source.Text.Replace("\t", "    "), @"//[ \t]*\<(\d+)\>[^\r\n]*", "<$1>");
 
 			base.VisitSource(source);
 		}

src/DocGenerator/Documentation/Blocks/CSharpBlock.cs

@@ -14,7 +14,7 @@ namespace DocGenerator.Documentation.Blocks
 	public class CSharpBlock : CodeBlock
 	{
 		private static readonly Regex Callout = new Regex(@"//[ \t]*(?<callout>\<\d+\>)[ \t]*(?<text>\S.*)", RegexOptions.Compiled);
-		private static readonly Regex CalloutReplacer = new Regex(@"//[ \t]*\<(\d+)\>.*", RegexOptions.Compiled);
+		private static readonly Regex CalloutReplacer = new Regex(@"//[ \t]*\<(\d+)\>[^\r\n]*", RegexOptions.Compiled);
 
 		public CSharpBlock(SyntaxNode node, int depth, string memberName = null)
 			: base(node.WithoutLeadingTrivia().ToFullStringWithoutPragmaWarningDirectiveTrivia(),