anchor.diff:  ##  and updating of the package in the GAP distribution.
   ##  
   
  -  README_URL := "http://school.maths.uwa.edu.au/~gregg/ACE/README",
  -  PackageInfoURL 
  -             := "http://school.maths.uwa.edu.au/~gregg/ACE/PackageInfo.g",
  +  SourceRepository := rec(
  +    Type := "git",
  +    URL := Concatenation( "https://github.com/gap-packages/", ~.PackageName ),
  +  ),
  +  IssueTrackerURL := Concatenation( ~.SourceRepository.URL, "/issues" ),
  +  PackageWWWHome  := Concatenation( "https://gap-packages.github.io/", 
  +                                    ~.PackageName ),
  +  README_URL      := Concatenation( ~.PackageWWWHome, "/README" ),
  +  PackageInfoURL  := Concatenation( ~.PackageWWWHome, "/PackageInfo.g" ),
  +  ArchiveURL      := Concatenation( ~.SourceRepository.URL,
  +                                    "/releases/download/v", ~.Version,
  +                                    "/", ~.PackageName ,"-", ~.Version ),
   
   ##  Here you  must provide a short abstract explaining the package content 
   ##  in HTML format (used on the package overview Web page) and an URL 
  
positive.code: 
    PackageName := "ACE",
    Subtitle    := "Advanced Coset Enumerator",
    Version     := "5.1",
    Date        := "22/01/2012",
    ArchiveURL  := "http://school.maths.uwa.edu.au/~gregg/ACE/ace-5.1",
    ArchiveFormats 
                := ".tar.gz",
  
  
negative.code:      interactive and non-interactive interface with the Todd-Coxeter coset\
       enumeration functions of the ACE (Advanced Coset Enumerator) C program.",
  
  ##  On the GAP Website there is an online version of all manuals in the
  ##  GAP distribution. To handle the documentation of a package it is
  ##  necessary to have:
  