Value of Content-Disposition header:

Content-Disposition: attachment; filename="\"quoting\" tested.html"

Test Description:

'attachment', specifying a filename of \"quoting\" tested.html (using double quotes around "quoting" to test... quoting)

UA should offer to download the resource as something like '"quoting" tested.html' (stripping the quotes may be ok for security reasons, but getting confused by them is not).