Update rubocop requirement from ~> 1.28.2 to ~> 1.50.2 (#454)

Updates the requirements on [rubocop](https://github.com/rubocop/rubocop) to permit the latest version.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop/rubocop/compare/v1.28.2...v1.50.2)

---
updated-dependencies:
- dependency-name: rubocop
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

6 files changed, 95 insertions, 95 deletions

diff --git a/spec/cli_spec.rb b/spec/cli_spec.rb
index 86f57ba..fd790a3 100644
--- a/spec/cli_spec.rb
+++ b/spec/cli_spec.rb
@@ -12,15 +12,15 @@ describe 'asciidoctor-epub3' do
   it 'exits with 1 when given nonexistent path' do
     _, err, res = to_epub Pathname.new('/nonexistent')
     expect(res.exitstatus).to eq(1)
-    expect(err).to match(/input file \/nonexistent( is)? missing/)
+    expect(err).to match(%r{input file /nonexistent( is)? missing})
   end
 
   it 'exits with 1 when epub validation fails with --failure-level=ERROR' do
     _, err, res = run_command asciidoctor_epub3_bin,
-        '--failure-level=ERROR',
-        '-a', 'ebook-validate',
-        fixture_file('invalid.adoc').to_s,
-        '-o', temp_file('invalid.epub').to_s
+                              '--failure-level=ERROR',
+                              '-a', 'ebook-validate',
+                              fixture_file('invalid.adoc').to_s,
+                              '-o', temp_file('invalid.epub').to_s
     expect(res.exitstatus).to eq(1)
     # Error from epubcheck
     expect(err).to include 'ERROR(RSC-012)'
@@ -63,12 +63,12 @@ describe 'asciidoctor-epub3' do
     expect(res.exitstatus).to eq(0)
   end
 
-  def to_mobi in_file, out_file
+  def to_mobi(in_file, out_file)
     skip_unless_has_kindlegen
     run_command asciidoctor_epub3_bin, '-a', 'ebook-format=mobi', in_file.to_s, '-o', out_file.to_s
   end
 
-  def to_epub in_file, out_file = nil
+  def to_epub(in_file, out_file = nil)
     argv = asciidoctor_epub3_bin + ['-a', 'ebook-validate', in_file.to_s]
     argv += ['-o', out_file.to_s] unless out_file.nil?
     run_command argv
diff --git a/spec/converter_spec.rb b/spec/converter_spec.rb
index 05bb0f1..5590042 100644
--- a/spec/converter_spec.rb
+++ b/spec/converter_spec.rb
@@ -13,13 +13,12 @@ describe Asciidoctor::Epub3::Converter do
     end
 
     it 'converts empty heredoc document to epub without exceptions' do
-      to_epub <<~EOS
-      EOS
+      to_epub ''
     end
 
     it 'converts minimal heredoc document to epub without exceptions' do
       book = to_epub <<~EOS
-      = Title
+        = Title
       EOS
       expect(book).to be_a(GEPUB::Book)
     end
@@ -81,7 +80,7 @@ describe Asciidoctor::Epub3::Converter do
 
     it 'supports quotes in section titles' do
       book, = to_epub <<~EOS
-= "Title"
+        = "Title"
       EOS
       chapter = book.item_by_href '_title.xhtml'
       expect(chapter).not_to be_nil
@@ -90,11 +89,11 @@ describe Asciidoctor::Epub3::Converter do
 
     it 'supports section numbers' do
       book, = to_epub <<~EOS
-= Title
-:sectnums:
-:doctype: book
+        = Title
+        :sectnums:
+        :doctype: book
 
-== Chapter
+        == Chapter
       EOS
       chapter = book.item_by_href '_chapter.xhtml'
       expect(chapter).not_to be_nil
@@ -117,7 +116,7 @@ describe Asciidoctor::Epub3::Converter do
     it 'populates ebook subject from keywords' do
       book, = to_epub fixture_file('keywords/book.adoc')
       keywords = book.subject_list.map(&:content)
-      expect(keywords).to eq(%w(a b c))
+      expect(keywords).to eq(%w[a b c])
     end
 
     it 'adds front matter page with images' do
@@ -167,23 +166,23 @@ describe Asciidoctor::Epub3::Converter do
 
     it 'supports custom epub-chapter-level' do
       book = to_epub <<~EOS
-= Book
-:epub-chapter-level: 2
-:doctype: book
+        = Book
+        :epub-chapter-level: 2
+        :doctype: book
 
-text0
+        text0
 
-== Level 1
+        == Level 1
 
-text1
+        text1
 
-=== Level 2
+        === Level 2
 
-text2
+        text2
 
-==== Level 3
+        ==== Level 3
 
-text3
+        text3
       EOS
 
       spine = book.spine.itemref_list
@@ -235,10 +234,10 @@ text3
 
     it 'adds book series metadata' do
       book = to_epub <<~EOS
-= Article
-:series-name: My Series
-:series-volume: 42
-:series-id: bla
+        = Article
+        :series-name: My Series
+        :series-volume: 42
+        :series-id: bla
       EOS
       meta = book.metadata.meta_list[1]
       expect(meta).not_to be_nil
@@ -250,10 +249,10 @@ text3
 
     it 'adds toc to spine' do
       book = to_epub <<~EOS
-= Title
-:toc:
+        = Title
+        :toc:
 
-Text
+        Text
       EOS
       spine = book.spine.itemref_list
       expect(spine).to have_size(2)
@@ -264,19 +263,19 @@ Text
 
     it "doesn't crash when sees inline toc" do
       to_epub <<~EOS
-= Title
+        = Title
 
-toc::[]
+        toc::[]
       EOS
     end
 
     it 'does not crash when sees inline pass macro `m` with an icon' do
       to_epub <<~EOS
-= Test
-:icons: font
-:call-to-action: pass:m,q[icon:hand-o-right[] *Call to Action*]
+        = Test
+        :icons: font
+        :call-to-action: pass:m,q[icon:hand-o-right[] *Call to Action*]
 
-{call-to-action}
+        {call-to-action}
       EOS
     end
 
@@ -292,9 +291,9 @@ toc::[]
 
     it 'supports remote video' do
       book, = to_epub <<~EOS
-= Article
+        = Article
 
-video::http://nonexistent/small.webm[]
+        video::http://nonexistent/small.webm[]
       EOS
       article = book.item_by_href '_article.xhtml'
       expect(article).not_to be_nil
@@ -317,9 +316,9 @@ video::http://nonexistent/small.webm[]
 
     it 'supports remote audio' do
       book, = to_epub <<~EOS
-= Article
+        = Article
 
-audio::http://nonexistent/small.mp3[]
+        audio::http://nonexistent/small.mp3[]
       EOS
       article = book.item_by_href '_article.xhtml'
       expect(article).not_to be_nil
@@ -332,27 +331,27 @@ audio::http://nonexistent/small.mp3[]
 
     it 'supports horizontal dlist' do
       book = to_epub <<~EOS
-= Article
+        = Article
 
-[horizontal]
-CPU:: The brain of the computer.
-Hard drive:: Permanent storage for operating system and/or user files.
-RAM:: Temporarily stores information the CPU uses during operation.
+        [horizontal]
+        CPU:: The brain of the computer.
+        Hard drive:: Permanent storage for operating system and/or user files.
+        RAM:: Temporarily stores information the CPU uses during operation.
       EOS
 
       chapter = book.item_by_href '_article.xhtml'
       expect(chapter).not_to be_nil
       expect(chapter.content).to include <<~EOS
-<tr>
-<td class="hdlist1">
-<p>
-CPU
-</p>
-</td>
-<td class="hdlist2">
-<p>The brain of the computer.</p>
-</td>
-</tr>
+        <tr>
+        <td class="hdlist1">
+        <p>
+        CPU
+        </p>
+        </td>
+        <td class="hdlist2">
+        <p>The brain of the computer.</p>
+        </td>
+        </tr>
       EOS
     end
   end
diff --git a/spec/image_spec.rb b/spec/image_spec.rb
index 437c950..f9bd2ea 100644
--- a/spec/image_spec.rb
+++ b/spec/image_spec.rb
@@ -32,12 +32,12 @@ describe 'Asciidoctor::Epub3::Converter - Image' do
 
   it 'does not duplicate images in manifest' do
     book, = to_epub fixture_file('inline-image/book.adoc')
-    expect(book.items.keys.select {|k| k.include? 'wolpertinger' }.size).to eq(1)
+    expect(book.items.keys.select { |k| k.include? 'wolpertinger' }.size).to eq(1)
   end
 
   it 'does not add data-uri images to manifest' do
     book, = to_epub fixture_file('inline-image/book.adoc'), attributes: { 'data-uri' => '' }
-    expect(book.manifest.items.select {|_, v| v.href.start_with? 'data:' }).to be_empty
+    expect(book.manifest.items.select { |_, v| v.href.start_with? 'data:' }).to be_empty
   end
 
   it 'converts font-based icons to CSS' do
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 6eac717..941c643 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -13,7 +13,7 @@ RSpec.configure do |config|
     FileUtils.rm_r temp_dir, force: true, secure: true
   end
 
-  def bin_script name, opts = {}
+  def bin_script(name, opts = {})
     path = Gem.bin_path (opts.fetch :gem, 'asciidoctor-epub3'), name
     [Gem.ruby, path]
   end
@@ -28,7 +28,7 @@ RSpec.configure do |config|
 
   def run_command cmd, *args
     Dir.chdir __dir__ do
-      if Array === cmd
+      if cmd.is_a?(Array)
         args.unshift(*cmd)
         cmd = args.shift
       end
@@ -67,13 +67,13 @@ RSpec.configure do |config|
     skip 'kindlegen gem is unavailable'
   end
 
-  def convert input, opts = {}
+  def convert(input, opts = {})
     opts[:backend] = 'epub3'
     opts[:header_footer] = true
     opts[:mkdirs] = true
     opts[:safe] = Asciidoctor::SafeMode::UNSAFE unless opts.key? :safe
 
-    if Pathname === input
+    if input.is_a?(Pathname)
       opts[:to_dir] = temp_dir.to_s unless opts.key?(:to_dir) || opts.key?(:to_file)
       Asciidoctor.convert_file input.to_s, opts
     else
@@ -81,15 +81,16 @@ RSpec.configure do |config|
     end
   end
 
-  def to_epub input, opts = {}
+  def to_epub(input, opts = {})
     result = convert input, opts
-    return result if GEPUB::Book === result
+    return result if result.is_a?(GEPUB::Book)
+
     output = Pathname.new result.attr('outfile')
     book = GEPUB::Book.parse output
     [book, output]
   end
 
-  def to_mobi input, opts = {}
+  def to_mobi(input, opts = {})
     skip_unless_has_kindlegen
     (opts[:attributes] ||= {})['ebook-format'] = 'mobi'
     doc = convert input, opts
@@ -100,11 +101,11 @@ RSpec.configure do |config|
 end
 
 RSpec::Matchers.define :have_size do |expected|
-  match {|actual| actual.size == expected }
-  failure_message {|actual| %(expected #{actual} to have size #{expected}, but was #{actual.size}) }
+  match { |actual| actual.size == expected }
+  failure_message { |actual| %(expected #{actual} to have size #{expected}, but was #{actual.size}) }
 end
 
 RSpec::Matchers.define :have_item_with_href do |expected|
-  match {|actual| actual.item_by_href expected }
-  failure_message {|actual| %(expected '#{actual.title}' to have item with href #{expected}) }
+  match { |actual| actual.item_by_href expected }
+  failure_message { |actual| %(expected '#{actual.title}' to have item with href #{expected}) }
 end
diff --git a/spec/table_spec.rb b/spec/table_spec.rb
index ec85d2f..653d9ea 100644
--- a/spec/table_spec.rb
+++ b/spec/table_spec.rb
@@ -5,11 +5,11 @@ require_relative 'spec_helper'
 describe 'Asciidoctor::Epub3::Converter - Table' do
   it 'supports halign' do
     book = to_epub <<~EOS
-= Article
+      = Article
 
-|===
->| Text
-|===
+      |===
+      >| Text
+      |===
     EOS
     article = book.item_by_href '_article.xhtml'
     expect(article).not_to be_nil
@@ -18,11 +18,11 @@ describe 'Asciidoctor::Epub3::Converter - Table' do
 
   it 'supports valign' do
     book = to_epub <<~EOS
-= Article
+      = Article
 
-|===
-.>| Text
-|===
+      |===
+      .>| Text
+      |===
     EOS
     article = book.item_by_href '_article.xhtml'
     expect(article).not_to be_nil
@@ -31,12 +31,12 @@ describe 'Asciidoctor::Epub3::Converter - Table' do
 
   it 'supports colwidth' do
     book = to_epub <<~EOS
-= Article
+      = Article
 
-[cols="3,1"]
-|===
-| A | B
-|===
+      [cols="3,1"]
+      |===
+      | A | B
+      |===
     EOS
     article = book.item_by_href '_article.xhtml'
     expect(article).not_to be_nil
diff --git a/spec/xref_spec.rb b/spec/xref_spec.rb
index a0fbed4..af3471d 100644
--- a/spec/xref_spec.rb
+++ b/spec/xref_spec.rb
@@ -51,18 +51,18 @@ describe 'Asciidoctor::Epub3::Converter - Xref' do
 
   it 'adds xref id to paragraph' do
     book = to_epub <<~EOS
-= Article
+      = Article
 
-[id=one]
-One
+      [id=one]
+      One
 
-[[two]]
-Two
+      [[two]]
+      Two
 
-[#three]
-Three
+      [#three]
+      Three
 
-More text
+      More text
     EOS
     article = book.item_by_href '_article.xhtml'
     expect(article).not_to be_nil
@@ -73,11 +73,11 @@ More text
 
   it 'displays anchor text' do
     book = to_epub <<~EOS
-= Article
+      = Article
 
-<<_subsection,link text>>
+      <<_subsection,link text>>
 
-== Subsection
+      == Subsection
     EOS
     article = book.item_by_href '_article.xhtml'
     expect(article).not_to be_nil