[MPOM-221] changed diff links to point to GitHub
diff --git a/maven-extensions/src/site-docs/apt/index.apt.vm b/maven-extensions/src/site-docs/apt/index.apt.vm
index acc3c7b..6c5eb80 100644
--- a/maven-extensions/src/site-docs/apt/index.apt.vm
+++ b/maven-extensions/src/site-docs/apt/index.apt.vm
@@ -51,22 +51,3 @@
 +-----+
 mvn -Preporting site-deploy
 +-----+
-
-* History
-
-#if( $project.version.endsWith( "SNAPSHOT" ) )
-#**##set( $prev = 33 )
-  master: {{{https://github.com/apache/maven-parent/tree/master/maven-extensions/pom.xml}$project.version}}
-  ({{{https://gitbox.apache.org/repos/asf?p=maven-parent.git;a=blobdiff;f=maven-extensions/pom.xml;hb=master;hpb=maven-parent-$prev}diff}})
-#end
-#macro ( display $version $date )
-#**##set( $prev = $version - 1 )
-|  {{{https://github.com/apache/maven-parent/tree/maven-parent-$version/maven-extensions/pom.xml}$version}}
-| ({{{https://gitbox.apache.org/repos/asf?p=maven-parent.git;a=blobdiff;f=maven-extensions/pom.xml;hb=maven-parent-$version;hpb=maven-parent-$prev}diff}}) | $date |
-#end
-
-*--------------+------------+
-|| <<Version>> || <<Release Date>> ||
-*--------------+------------+
-#display( 34, '2020-01-17' )
-*--------------+------------+
diff --git a/maven-plugins/src/site-docs/apt/index.apt.vm b/maven-plugins/src/site-docs/apt/index.apt.vm
index 6807a9d..368ec4d 100644
--- a/maven-plugins/src/site-docs/apt/index.apt.vm
+++ b/maven-plugins/src/site-docs/apt/index.apt.vm
@@ -58,12 +58,12 @@
 #if( $project.version.endsWith( "SNAPSHOT" ) )
 #**##set( $prev = 33 )
   master: {{{https://github.com/apache/maven-parent/tree/master/maven-plugins/pom.xml}$project.version}}
-  ({{{https://gitbox.apache.org/repos/asf?p=maven-parent.git;a=blobdiff;f=maven-plugins/pom.xml;hb=master;hpb=maven-parent-$prev}diff}})
+  ({{{https://github.com/apache/maven-parent/compare/maven-parent-$prev...master#diff}diff}})
 #end
 #macro ( display $version $date )
 #**##set( $prev = $version - 1 )
 |  {{{https://github.com/apache/maven-parent/tree/maven-parent-$version/maven-plugins/pom.xml}$version}}
-| ({{{https://gitbox.apache.org/repos/asf?p=maven-parent.git;a=blobdiff;f=maven-plugins/pom.xml;hb=maven-parent-$version;hpb=maven-parent-$prev}diff}}) | $date |
+| ({{{https://github.com/apache/maven-parent/compare/maven-parent-$prev...maven-parent-$version#diff}diff}}) | $date |
 #end
 
     As of version 30, this POM sets the Java source and target versions to 1.6. Thus any plugin
diff --git a/maven-shared-components/src/site-docs/apt/index.apt.vm b/maven-shared-components/src/site-docs/apt/index.apt.vm
index 65ed42d..32be328 100644
--- a/maven-shared-components/src/site-docs/apt/index.apt.vm
+++ b/maven-shared-components/src/site-docs/apt/index.apt.vm
@@ -46,12 +46,12 @@
 #if( $project.version.endsWith( "SNAPSHOT" ) )
 #**##set( $prev = 33 )
   master: {{{https://github.com/apache/maven-parent/tree/master/maven-shared-components/pom.xml}$project.version}}
-  ({{{https://gitbox.apache.org/repos/asf?p=maven-parent.git;a=blobdiff;f=maven-shared-components/pom.xml;hb=master;hpb=maven-parent-$prev}diff}})
+  ({{{https://github.com/apache/maven-parent/compare/maven-parent-$prev...master#diff}diff}})
 #end
 #macro ( display $version $date )
 #**##set( $prev = $version - 1 )
 |  {{{https://github.com/apache/maven-parent/tree/maven-parent-$version/maven-shared-components/pom.xml}$version}}
-| ({{{https://gitbox.apache.org/repos/asf?p=maven-parent.git;a=blobdiff;f=maven-shared-components/pom.xml;hb=maven-parent-$version;hpb=maven-parent-$prev}diff}}) | $date |
+| ({{{https://github.com/apache/maven-parent/compare/maven-parent-$prev...maven-parent-$version#diff}diff}}) | $date |
 #end
 
     As of version 30, this POM sets the Java source and target versions to 1.6. Thus any component
diff --git a/maven-skins/src/site-docs/apt/index.apt.vm b/maven-skins/src/site-docs/apt/index.apt.vm
index ba7f967..ab4baae 100644
--- a/maven-skins/src/site-docs/apt/index.apt.vm
+++ b/maven-skins/src/site-docs/apt/index.apt.vm
@@ -36,12 +36,12 @@
 #if( $project.version.endsWith( "SNAPSHOT" ) )
 #**##set( $prev = 33 )
   master: {{{https://github.com/apache/maven-parent/tree/master/maven-skins/pom.xml}$project.version}}
-  ({{{https://gitbox.apache.org/repos/asf?p=maven-parent.git;a=blobdiff;f=maven-skins/pom.xml;hb=master;hpb=maven-parent-$prev}diff}})
+  ({{{https://github.com/apache/maven-parent/compare/maven-parent-$prev...master#diff}diff}})
 #end
 #macro ( display $version $date )
 #**##set( $prev = $version - 1 )
 |  {{{https://github.com/apache/maven-parent/tree/maven-parent-$version/maven-skins/pom.xml}$version}}
-| ({{{https://gitbox.apache.org/repos/asf?p=maven-parent.git;a=blobdiff;f=maven-skins/pom.xml;hb=maven-parent-$version;hpb=maven-parent-$prev}diff}}) | $date |
+| ({{{https://github.com/apache/maven-parent/compare/maven-parent-$prev...maven-parent-$version#diff}diff}}) | $date |
 #end
 
 *--------------+------------+
diff --git a/src/site-docs/apt/index.apt.vm b/src/site-docs/apt/index.apt.vm
index 3c1f966..1f207e0 100644
--- a/src/site-docs/apt/index.apt.vm
+++ b/src/site-docs/apt/index.apt.vm
@@ -90,13 +90,13 @@
 #if( $project.version.endsWith( "SNAPSHOT" ) )
 #**##set( $prev = 33 )
   master: {{{https://github.com/apache/maven-parent/tree/master/pom.xml}$project.version}}
-  ({{{https://gitbox.apache.org/repos/asf?p=maven-parent.git;a=blobdiff;f=pom.xml;hb=master;hpb=maven-parent-$prev}diff}},
+  ({{{https://github.com/apache/maven-parent/compare/maven-parent-$prev...master#diff}diff}},
   {{{https://github.com/apache/maven-parent/compare/maven-parent-$prev...master}commits}})
 #end
 #macro ( display $version $date )
 #**##if ( $version == 30 ) #set( $prev = 27 )#else#set( $prev = $version - 1 )#end
 |  {{{https://github.com/apache/maven-parent/tree/maven-parent-$version/pom.xml}$version}}
-| ({{{https://gitbox.apache.org/repos/asf?p=maven-parent.git;a=blobdiff;f=pom.xml;hb=maven-parent-$version;hpb=maven-parent-$prev}diff}},
+| ({{{https://github.com/apache/maven-parent/compare/maven-parent-$prev...maven-parent-$version#diff}diff}},
 |  {{{https://github.com/apache/maven-parent/compare/maven-parent-$prev...maven-parent-$version}commits}}) | $date |
 #end