Fix safe performance offenses

- Performance/CompareWithBlock
- Performance/ConstantRegexp
- Performance/RedundantSplitRegexpArgument
- Performance/StringReplacement

Author: tagliala

.rubocop_todo.yml

@@ -18,7 +18,7 @@ def initialize(paths: [], filters: [])
       @paths = Array(paths).compact.map { |p| Pathname.new(p) }
       @filters = Array(filters).map { |f| Regexp.new(f) }
       @assets = @paths.reduce({}) { |assets, p| assets.merge(read_assets(assets, p)) }
-      @sorted_asset_keys = assets.keys.sort { |a, b| a.size <=> b.size }
+      @sorted_asset_keys = assets.keys.sort_by(&:size)
     end
 
     # Public: Finds the named asset and returns the contents as a string.

lib/inline_svg/cached_asset_file.rb

@@ -15,7 +15,7 @@ def with_valid_hash_from(hash)
     end
 
     def dasherize(string)
-      string.to_s.gsub(/_/, "-")
+      string.to_s.tr('_', "-")
     end
   end
 end

lib/inline_svg/transform_pipeline/transformations/data_attributes.rb

@@ -8,11 +8,11 @@ def transform(doc)
     end
 
     def width_of(value)
-      value.split(/\*/).map(&:strip)[0]
+      value.split("*").map(&:strip)[0]
     end
 
     def height_of(value)
-      value.split(/\*/).map(&:strip)[1] || width_of(value)
+      value.split("*").map(&:strip)[1] || width_of(value)
     end
   end
 end

lib/inline_svg/transform_pipeline/transformations/size.rb

@@ -104,15 +104,15 @@ def self.named(filename); end
           InlineSvg.configure do |config|
             config.add_custom_transformation(attribute: :irrelevant, transform: MyInvalidCustomTransformKlass)
           end
-        end.to raise_error(InlineSvg::Configuration::Invalid, /#{MyInvalidCustomTransformKlass} should implement the .create_with_value and #transform methods/)
+        end.to raise_error(InlineSvg::Configuration::Invalid, /#{MyInvalidCustomTransformKlass} should implement the .create_with_value and #transform methods/o)
       end
 
       it "rejects transformations that does not implement #transform" do
         expect do
           InlineSvg.configure do |config|
             config.add_custom_transformation(attribute: :irrelevant, transform: MyInvalidCustomTransformInstance)
           end
-        end.to raise_error(InlineSvg::Configuration::Invalid, /#{MyInvalidCustomTransformInstance} should implement the .create_with_value and #transform methods/)
+        end.to raise_error(InlineSvg::Configuration::Invalid, /#{MyInvalidCustomTransformInstance} should implement the .create_with_value and #transform methods/o)
       end
 
       it "rejects transformations that are not classes" do