nit

Author: BrennanConroy

src/Servers/Kestrel/Core/src/Internal/Http/Http1Connection.cs

@@ -290,6 +290,7 @@ bool TrimAndTakeMessageHeaders(ref SequenceReader<byte> reader, bool trailers)
 
     public void OnStartLine(HttpVersionAndMethod versionAndMethod, TargetOffsetPathLength targetPath, Span<byte> startLine)
     {
+        // Null characters are not allowed and should have been checked by HttpParser before calling this method
         Debug.Assert(startLine.IndexOf((byte)0) == -1);
 
         var targetStart = targetPath.Offset;