1 files changed, 4 insertions, 8 deletions
diff --git a/lib/rdoc/generator/darkfish.rb b/lib/rdoc/generator/darkfish.rb
index b46861d009..1b408a6f8e 100644
--- a/lib/rdoc/generator/darkfish.rb
+++ b/lib/rdoc/generator/darkfish.rb
@@ -220,8 +220,8 @@ class RDoc::Generator::Darkfish
       install_rdoc_static_file @template_dir + item, "./#{item}", options
     end
 
-    @options.template_stylesheets.each do |stylesheet|
-      FileUtils.cp stylesheet, '.', options
+    unless @options.template_stylesheets.empty?
+      FileUtils.cp @options.template_stylesheets, '.', **options
     end
 
     Dir[(@template_dir + "{js,images}/**/*").to_s].each do |path|
@@ -610,7 +610,7 @@ class RDoc::Generator::Darkfish
 
     @classes = @store.all_classes_and_modules.sort
     @files   = @store.all_files.sort
-    @methods = @classes.map { |m| m.method_list }.flatten.sort
+    @methods = @classes.flat_map { |m| m.method_list }.sort
     @modsort = get_sorted_module_list @classes
   end
 
@@ -778,11 +778,7 @@ class RDoc::Generator::Darkfish
       erbout = "_erbout_#{file_var}"
     end
 
-    if RUBY_VERSION >= '2.6'
-      template = klass.new template, trim_mode: '-', eoutvar: erbout
-    else
-      template = klass.new template, nil, '-', erbout
-    end
+    template = klass.new template, trim_mode: '-', eoutvar: erbout
     @template_cache[file] = template
     template
   end