scrapy/w3lib — pull request #27 by csalazar (2014-08-05 10:04:51+00:00)
Title: Fixed headers_dict_to_raw() when a value of integer type is present

Hi, I added support to parse numeric values of integer type present in headers. I check other responses and numeric values are always represented by strings, but in this case I received an integer type inside a list from a FTP response.

It was the response I received:

```[('Local Filename', ['']), ('Size', [46896])]```