The Bug reporting page has this:
ser@box:~/w3af$ wget http://goo.gl/eXpPDl
user@box:~/w3af$ chmod +x collect-sysinfo.py
But that resulted in a file named eXpPDI instead of collect-sysinfo.py
It's the right file, just a different name. I didn't bother to rename it, just gave it execute permissions and ran it. No big deal for me but I'm been using unix/linux boxes since the 80s. Most things seem obvious to me. Would probably be confusing to a new user.
Fix Bug reporting web page slightly misleading #14273