class Rake::Task

def add_comment(comment)

the new comment with " / ".
Add a comment to the task. If a comment already exists, separate
def add_comment(comment)
  if @full_comment
    @full_comment << " / "
  else
    @full_comment = ''
  end
  @full_comment << comment
  if @full_comment =~ /\A([^.]+?\.)( |$)/
    @comment = $1
  else
    @comment = @full_comment
  end
end