Delegate ERB args correctly

Author: aycabta

lib/rdoc/erbio.rb

@@ -20,11 +20,11 @@ class RDoc::ERBIO < ERB
   ##
   # Defaults +eoutvar+ to 'io', otherwise is identical to ERB's initialize
 
-  def initialize str, safe_level = nil, trim_mode = nil, eoutvar = 'io'
+  def initialize str, safe_level = nil, legacy_trim_mode = nil, legacy_eoutvar = 'io', trim_mode: nil, eoutvar: 'io'
     if RUBY_VERSION >= '2.6'
       super(str, trim_mode: trim_mode, eoutvar: eoutvar)
     else
-      super
+      super(str, safe_level, legacy_trim_mode, legacy_eoutvar)
     end
   end
 

lib/rdoc/generator/darkfish.rb

@@ -779,9 +779,9 @@ def template_for file, page = true, klass = ERB
     end
 
     if RUBY_VERSION >= '2.6'
-      template = klass.new template, trim_mode: '<>', eoutvar: erbout
+      template = klass.new template, trim_mode: '-', eoutvar: erbout
     else
-      template = klass.new template, nil, '<>', erbout
+      template = klass.new template, nil, '-', erbout
     end
     @template_cache[file] = template
     template