gnus: Newsgroups File Format

 
 11.7.9.2 Newsgroups File Format
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 The newsgroups file lists groups along with their descriptions.  Not all
 groups on the server have to be listed, and not all groups in the file
 have to exist on the server.  The file is meant purely as information to
 the user.
 
    The format is quite simple; a group name, a tab, and the description.
 Here’s the definition:
 
      newsgroups    = *line
      line          = group tab description <NEWLINE>
      group         = <non-white-space string>
      tab           = <TAB>
      description   = <string>