minor code style change

2 files changed, 2 insertions, 2 deletions

diff --git a/lib/asciidoctor/pdf/ext/asciidoctor/image.rb b/lib/asciidoctor/pdf/ext/asciidoctor/image.rb
index 94988c87..41451c5b 100644
--- a/lib/asciidoctor/pdf/ext/asciidoctor/image.rb
+++ b/lib/asciidoctor/pdf/ext/asciidoctor/image.rb
@@ -13,7 +13,7 @@ module Asciidoctor
       if (image_path.start_with? 'data:') && (m = DataUriRx.match image_path)
         [(m[:data].extend ::Base64), (FormatAliases.fetch m[:fmt], m[:fmt])]
       else
-        [image_path, attributes&.[]('format') || ((ext = ::File.extname image_path).downcase.slice 1, ext.length)]
+        [image_path, (attributes&.[] 'format') || ((ext = ::File.extname image_path).downcase.slice 1, ext.length)]
       end
     end
 
diff --git a/lib/asciidoctor/pdf/ext/prawn/formatted_text/arranger.rb b/lib/asciidoctor/pdf/ext/prawn/formatted_text/arranger.rb
index 287d56cb..9117ed44 100644
--- a/lib/asciidoctor/pdf/ext/prawn/formatted_text/arranger.rb
+++ b/lib/asciidoctor/pdf/ext/prawn/formatted_text/arranger.rb
@@ -13,7 +13,7 @@ Prawn::Text::Formatted::Arranger.prepend (Module.new do
   end
 
   def format_array= array
-    @normalize_line_height = !array.empty? && (array[0].delete :normalize_line_height)
+    @normalize_line_height = (array[0]&.delete :normalize_line_height) || false
     super
   end