anchor.diff:      /// Task of `Some HttpContext` after writing to the body of the response.
       ///
       member this.WriteTextAsync (str : string) =
  -        this.SetContentType "text/plain"
  +        this.SetContentType "text/plain; charset=utf-8"
           this.WriteStringAsync str
   
       /// **Description**
  
positive.code:     ///
      member this.WriteJsonChunkedAsync<'T> (dataObj : 'T) =
          task {
              this.SetContentType "application/json"
              this.SetHttpHeader "Transfer-Encoding" "chunked"
              let serializer = this.GetJsonSerializer()
              do! serializer.SerializeToStreamAsync dataObj this.Response.Body
  
negative.code:     /// Task of `Some HttpContext` after writing to the body of the response.
      ///
      member this.WriteJsonAsync<'T> (dataObj : 'T) =
          this.SetContentType "application/json; charset=utf-8"
          let serializer = this.GetJsonSerializer()
          serializer.SerializeToBytes dataObj
          |> this.WriteBytesAsync
  