Clarify XML doc comment

Co-authored-by: Jan Jones <[email protected]>

Author: DustinCampbell

src/Compiler/Microsoft.CodeAnalysis.Razor.Compiler/src/Language/RazorHtmlWriter.cs

@@ -341,7 +341,7 @@ private void WriteNonHtmlToken(SyntaxToken token)
     }
 
     /// <summary>
-    ///  Returns <see langword="true"/> if the new span starts after the last span.
+    ///  Returns <see langword="true"/> if the new span starts immediately after the last span.
     /// </summary>
     private static bool TouchesLastSpan(SourceSpan newSpan, SourceSpan lastSpan)
         => newSpan.AbsoluteIndex == lastSpan.AbsoluteIndex + lastSpan.Length;