Fix negated if offenses

Should also provide a negligible performance improvement, about 3%
on Ruby 3.2 and 6% on Ruby 2.6 (M1 Pro)

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/axlsx/package.rb b/lib/axlsx/package.rb
index 26f838f8..6aec6930 100644
--- a/lib/axlsx/package.rb
+++ b/lib/axlsx/package.rb
@@ -101,7 +101,7 @@ module Axlsx
     #   s = p.to_stream()
     #   File.open('example_streamed.xlsx', 'wb') { |f| f.write(s.read) }
     def serialize(output, options = {}, secondary_options = nil)
-      if !workbook.styles_applied
+      unless workbook.styles_applied
         workbook.apply_styles
       end
 
@@ -126,7 +126,7 @@ module Axlsx
     # @param [Boolean] confirm_valid Validate the package prior to serialization.
     # @return [StringIO|Boolean] False if confirm_valid and validation errors exist. rewound string IO if not.
     def to_stream(confirm_valid = false)
-      if !workbook.styles_applied
+      unless workbook.styles_applied
         workbook.apply_styles
       end