Minor gemspec formatting changes for space/readability.

.rubocop.yml

@@ -48,9 +48,10 @@ Metrics/AbcSize:
   Exclude:
     - 'test/**/*.rb'
 
-# Turn block length metrics off for the tests.
+# Turn block length metrics off for the tests and gemspec.
 Metrics/BlockLength:
   Exclude:
+    - 'rubyzip.gemspec'
     - 'test/**/*.rb'
 
 # Turn class length metrics off for the tests.

rubyzip.gemspec

@@ -13,6 +13,7 @@ Gem::Specification.new do |s|
   s.files         = Dir.glob('{samples,lib}/**/*.rb') + %w[README.md TODO Rakefile]
   s.require_paths = ['lib']
   s.license       = 'BSD-2-Clause'
+
   s.metadata      = {
     'bug_tracker_uri'   => 'https://github.com/rubyzip/rubyzip/issues',
     'changelog_uri'     => "https://github.com/rubyzip/rubyzip/blob/v#{s.version}/Changelog.md",
@@ -20,7 +21,9 @@ Gem::Specification.new do |s|
     'source_code_uri'   => "https://github.com/rubyzip/rubyzip/tree/v#{s.version}",
     'wiki_uri'          => 'https://github.com/rubyzip/rubyzip/wiki'
   }
+
   s.required_ruby_version = '>= 2.4'
+
   s.add_development_dependency 'minitest', '~> 5.4'
   s.add_development_dependency 'rake', '~> 12.3.3'
   s.add_development_dependency 'rubocop', '~> 1.12.0'