Rakefile in dbf-4.2.2 vs Rakefile in dbf-4.2.3

@@ -5,10 +5,10 @@
 RSpec::Core::RakeTask.new :spec do |t|
   t.rspec_opts = %w[--color]
 end
 
 RSpec::Core::RakeTask.new :specdoc do |t|
-  t.rspec_opts = %w[-fl]
+  t.rspec_opts = %w[-fdocumentation]
 end
 
 task default: :spec
 
 desc 'Open an irb session preloaded with this library'