8 files changed, 12 insertions, 12 deletions
diff --git a/lib/axlsx/drawing/num_val.rb b/lib/axlsx/drawing/num_val.rb
index 19829a30..862d22ae 100644
--- a/lib/axlsx/drawing/num_val.rb
+++ b/lib/axlsx/drawing/num_val.rb
@@ -25,7 +25,7 @@ module Axlsx
     # serialize the object
     def to_xml_string(idx, str = +'')
       Axlsx::validate_unsigned_int(idx)
-      if !v.to_s.empty?
+      unless v.to_s.empty?
         str << '<c:pt idx="' << idx.to_s << '" formatCode="' << format_code << '"><c:v>' << v.to_s << '</c:v></c:pt>'
       end
     end
diff --git a/lib/axlsx/drawing/str_val.rb b/lib/axlsx/drawing/str_val.rb
index d09e6ce8..86663cec 100644
--- a/lib/axlsx/drawing/str_val.rb
+++ b/lib/axlsx/drawing/str_val.rb
@@ -25,7 +25,7 @@ module Axlsx
     # serialize the object
     def to_xml_string(idx, str = +'')
       Axlsx::validate_unsigned_int(idx)
-      if !v.to_s.empty?
+      unless v.to_s.empty?
         str << '<c:pt idx="' << idx.to_s << '"><c:v>' << ::CGI.escapeHTML(v.to_s) << '</c:v></c:pt>'
       end
     end
diff --git a/lib/axlsx/package.rb b/lib/axlsx/package.rb
index 295ff2eb..4597efc0 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
 
diff --git a/lib/axlsx/stylesheet/styles.rb b/lib/axlsx/stylesheet/styles.rb
index e518d21e..6356d9e6 100644
--- a/lib/axlsx/stylesheet/styles.rb
+++ b/lib/axlsx/stylesheet/styles.rb
@@ -381,7 +381,7 @@ module Axlsx
       end
 
       validate_border_hash = ->(val) {
-        if !(val.key?(:style) && val.key?(:color))
+        unless val.key?(:style) && val.key?(:color)
           raise ArgumentError, (ERR_INVALID_BORDER_OPTIONS % options[:border])
         end
       }
@@ -439,7 +439,7 @@ module Axlsx
           next
         end
 
-        if !edge_b_opts.empty?
+        unless edge_b_opts.empty?
           if base_border_opts.empty?
             validate_border_hash.call(edge_b_opts)
           end
diff --git a/lib/axlsx/util/zip_command.rb b/lib/axlsx/util/zip_command.rb
index 44e06af5..77cc44c7 100644
--- a/lib/axlsx/util/zip_command.rb
+++ b/lib/axlsx/util/zip_command.rb
@@ -63,7 +63,7 @@ module Axlsx
       escaped_dir = Shellwords.shellescape(@dir)
       command = "cd #{escaped_dir} && #{@zip_command} #{output} #{inputs}"
       stdout_and_stderr, status = Open3.capture2e(command)
-      if !status.success?
+      unless status.success?
         raise ZipError, stdout_and_stderr
       end
     end
diff --git a/lib/axlsx/workbook/workbook.rb b/lib/axlsx/workbook/workbook.rb
index e6e2f06f..271d4300 100644
--- a/lib/axlsx/workbook/workbook.rb
+++ b/lib/axlsx/workbook/workbook.rb
@@ -197,7 +197,7 @@ module Axlsx
     # A helper to apply styles that were added using `worksheet.add_style`
     # @return [Boolean]
     def apply_styles
-      return false if !styled_cells
+      return false unless styled_cells
 
       styled_cells.each do |cell|
         current_style = styles.style_index[cell.style]
diff --git a/lib/axlsx/workbook/worksheet/border_creator.rb b/lib/axlsx/workbook/worksheet/border_creator.rb
index 9abaded5..04a9cfac 100644
--- a/lib/axlsx/workbook/worksheet/border_creator.rb
+++ b/lib/axlsx/workbook/worksheet/border_creator.rb
@@ -17,7 +17,7 @@ module Axlsx
       else
         @edges = @edges.map { |x| x&.to_sym }.uniq
 
-        if !(@edges - Axlsx::Border::EDGES).empty?
+        unless (@edges - Axlsx::Border::EDGES).empty?
           raise ArgumentError, "Invalid edges provided, #{edges}"
         end
       end
diff --git a/lib/axlsx/workbook/worksheet/worksheet.rb b/lib/axlsx/workbook/worksheet/worksheet.rb
index f2587edb..29a22db1 100644
--- a/lib/axlsx/workbook/worksheet/worksheet.rb
+++ b/lib/axlsx/workbook/worksheet/worksheet.rb
@@ -584,7 +584,7 @@ module Axlsx
     # @param [String|Array] cell_refs Cell references
     # @param [Hash] styles
     def add_style(cell_refs, *styles)
-      if !cell_refs.is_a?(Array)
+      unless cell_refs.is_a?(Array)
         cell_refs = [cell_refs]
       end
 
@@ -613,7 +613,7 @@ module Axlsx
         border_edges = options
       end
 
-      if !cell_refs.is_a?(Array)
+      unless cell_refs.is_a?(Array)
         cell_refs = [cell_refs]
       end
 
@@ -850,7 +850,7 @@ module Axlsx
     end
 
     def add_autofilter_defined_name_to_workbook
-      return if !auto_filter.range
+      return unless auto_filter.range
 
       workbook.add_defined_name auto_filter.defined_name, name: '_xlnm._FilterDatabase', local_sheet_id: index, hidden: 1
     end