in src/main/java/org/apache/maven/plugin/changelog/ChangeLogReport.java [1278:1287]
protected void doSummary( ChangeLogSet set, ResourceBundle bundle, Sink sink )
{
sink.paragraph();
sink.text( bundle.getString( "report.TotalCommits" ) );
sink.text( ": " + set.getChangeSets().size() );
sink.lineBreak();
sink.text( bundle.getString( "report.changelog.FilesChanged" ) );
sink.text( ": " + countFilesChanged( set.getChangeSets() ) );
sink.paragraph_();
}