Autofix some safe RuboCop offenses

- `Layout/DotPosition`
- `Lint/AmbiguousOperator`
- `Lint/LiteralInInterpolation`
- `RSpec/BeEmpty`
- `RSpec/ContextMethod`
- `RSpec/HookArgument`
- `RSpec/MatchArray`
- `RSpec/NotToNot`
- `Style/EachWithObject`
- `Style/ExpandPathArguments`
- `Style/HashSyntax`
- `Style/NestedParenthesizedCalls`
- `Style/RedundantBegin`
- `Style/RedundantConstantBase`
- `Style/RedundantReturn`
- `Style/RegexpLiteral`

Some manual fixes:
- `Lint/RedundantSplatExpansion` and subsequent unsafe
  manual fix of `Style/HashConversion`
- `Style/NonNilCheck` and subsequent switch unsafe manual fix of
  `Style/InverseMethods`

Rakefile

@@ -5,4 +5,4 @@ RSpec::Core::RakeTask.new(:spec) do |t|
   t.pattern = Dir.glob("spec/**/*_spec.rb")
   # t.rspec_opts = "--format documentation"
 end
-task :default => :spec
+task default: :spec

lib/inline_svg.rb

@@ -30,16 +30,14 @@ def initialize
     end
 
     def asset_file=(custom_asset_file)
-      begin
-        method = custom_asset_file.method(:named)
-        if method.arity == 1
-          @asset_file = custom_asset_file
-        else
-          raise InlineSvg::Configuration::Invalid.new("asset_file should implement the #named method with arity 1")
-        end
-      rescue NameError
-        raise InlineSvg::Configuration::Invalid.new("asset_file should implement the #named method")
+      method = custom_asset_file.method(:named)
+      if method.arity == 1
+        @asset_file = custom_asset_file
+      else
+        raise InlineSvg::Configuration::Invalid.new("asset_file should implement the #named method with arity 1")
       end
+    rescue NameError
+      raise InlineSvg::Configuration::Invalid.new("asset_file should implement the #named method")
     end
 
     def asset_finder=(finder)
@@ -67,7 +65,7 @@ def add_custom_transformation(options)
         raise InlineSvg::Configuration::Invalid.new("#{options.fetch(:transform)} should implement the .create_with_value and #transform methods")
       end
 
-      @custom_transformations.merge!(Hash[*[options.fetch(:attribute, :no_attribute), options]])
+      @custom_transformations.merge!(options.fetch(:attribute, :no_attribute) => options)
     end
 
     def raise_on_file_not_found=(value)

lib/inline_svg/action_view/helpers.rb

@@ -54,9 +54,9 @@ def placeholder(filename)
         not_found_message = "'#{ERB::Util.html_escape_once(filename)}' #{extension_hint(filename)}"
 
         if css_class.nil?
-          return "<svg><!-- SVG file not found: #{not_found_message}--></svg>".html_safe
+          "<svg><!-- SVG file not found: #{not_found_message}--></svg>".html_safe
         else
-          return "<svg class='#{css_class}'><!-- SVG file not found: #{not_found_message}--></svg>".html_safe
+          "<svg class='#{css_class}'><!-- SVG file not found: #{not_found_message}--></svg>".html_safe
         end
       end
 

lib/inline_svg/transform_pipeline/transformations.rb

@@ -24,11 +24,10 @@ def self.custom_transformations
   end
 
   def self.magnify_priorities(transforms)
-    transforms.inject({}) do |output, (name, definition)|
+    transforms.each_with_object({}) do |(name, definition), output|
       priority = definition.fetch(:priority, built_in_transformations.size)
 
       output[name] = definition.merge({ priority: magnify(priority) })
-      output
     end
   end
 
@@ -65,7 +64,7 @@ def self.without_empty_values(params)
   def self.all_default_values
     custom_transformations
       .values
-      .select { |opt| opt[:default_value] != nil }
+      .reject { |opt| opt[:default_value].nil? }
       .map { |opt| [opt[:attribute], opt[:default_value]] }
       .inject({}) { |options, attrs| options.merge!(attrs[0] => attrs[1]) }
   end

spec/cached_asset_file_spec.rb

@@ -4,7 +4,7 @@
 require "inline_svg"
 
 describe InlineSvg::CachedAssetFile do
-  let(:fixture_path) { Pathname.new(File.expand_path("../files/static_assets", __FILE__)) }
+  let(:fixture_path) { Pathname.new(File.expand_path('files/static_assets', __dir__)) }
 
   it "loads assets under configured paths" do
     known_document = File.read(fixture_path.join("assets0", "known-document.svg"))

spec/finds_asset_paths_spec.rb

@@ -6,8 +6,8 @@
     it "returns fully qualified file paths from Sprockets" do
       sprockets = double('SprocketsDouble')
 
-      expect(sprockets).to receive(:find_asset).with('some-file').
-        and_return(double(pathname: Pathname('/full/path/to/some-file')))
+      expect(sprockets).to receive(:find_asset).with('some-file')
+                                               .and_return(double(pathname: Pathname('/full/path/to/some-file')))
 
       InlineSvg.configure do |config|
         config.asset_finder = sprockets
@@ -21,8 +21,8 @@
     it "returns fully qualified file paths from Sprockets" do
       sprockets = double('SprocketsDouble')
 
-      expect(sprockets).to receive(:find_asset).with('some-file').
-        and_return(double(filename: Pathname('/full/path/to/some-file')))
+      expect(sprockets).to receive(:find_asset).with('some-file')
+                                               .and_return(double(filename: Pathname('/full/path/to/some-file')))
 
       InlineSvg.configure do |config|
         config.asset_finder = sprockets
@@ -50,8 +50,8 @@
     it "returns fully qualified file paths from Propshaft" do
       propshaft = double('PropshaftDouble')
 
-      expect(propshaft).to receive(:find_asset).with('some-file').
-        and_return(double(pathname: Pathname('/full/path/to/some-file')))
+      expect(propshaft).to receive(:find_asset).with('some-file')
+                                               .and_return(double(pathname: Pathname('/full/path/to/some-file')))
 
       InlineSvg.configure do |config|
         config.asset_finder = propshaft
@@ -65,8 +65,8 @@
     it "returns the fully qualified file path" do
       shakapacker = double('ShakapackerDouble')
 
-      expect(shakapacker).to receive(:find_asset).with('some-file').
-        and_return(double(filename: Pathname('/full/path/to/some-file')))
+      expect(shakapacker).to receive(:find_asset).with('some-file')
+                                                 .and_return(double(filename: Pathname('/full/path/to/some-file')))
 
       InlineSvg.configure do |config|
         config.asset_finder = shakapacker
@@ -80,8 +80,8 @@
     it "returns the fully qualified file path" do
       shakapacker = double('ShakapackerDouble')
 
-      expect(shakapacker).to receive(:find_asset).with('some-file').
-        and_return(double(filename: Pathname('https://my-fancy-domain.test/full/path/to/some-file')))
+      expect(shakapacker).to receive(:find_asset).with('some-file')
+                                                 .and_return(double(filename: Pathname('https://my-fancy-domain.test/full/path/to/some-file')))
 
       InlineSvg.configure do |config|
         config.asset_finder = shakapacker