[Bug 48184] New: Error in repository for Ubuntu 19.10. Malformed entry 52 in sources.list

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48184

Bug ID: 48184
           Summary: Error in repository for Ubuntu 19.10. Malformed entry
                    52 in sources.list
           Product: Packaging
           Version: unspecified
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: blocker
          Priority: P2
         Component: wine-packages
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail], [e-mail],
                    [e-mail]
      Distribution: ---

I cannot add the Ubuntu 19.10 repository:

pat@cyberpower:~$ sudo apt-add-repository 'deb
https://dl.winehq.org/wine-builds/ubuntu/eoan main'
[sudo] password for pat: 
E: Malformed entry 52 in list file /etc/apt/sources.list (Component)
E: The list of sources could not be read.