lib/asciidoctor-bibliography/bibliographer.rb in asciidoctor-bibliography-0.5.0 vs lib/asciidoctor-bibliography/bibliographer.rb in asciidoctor-bibliography-0.5.1

@@ -9,10 +9,10 @@
     def initialize
       @options = {}
       @citations = []
       @indices = []
       @database = nil
-      @occurring_keys = Hash.new([])
+      @occurring_keys = {}
     end
 
     def add_citation(citation)
       citations << citation
       citation.citation_items.group_by(&:target).each do |target, citation_items|