mojo_magick.gemspec in mojo_magick-0.5.6 vs mojo_magick.gemspec in mojo_magick-0.5.7

@@ -1,37 +1,38 @@
-$:.push File.expand_path("../lib", __FILE__)
-require "mojo_magick/version"
+$:.push File.expand_path('lib', __dir__)
+require 'mojo_magick/version'
 
-post_install_message = <<EOF
+post_install_message = <<~EOF
 
-Thanks for installing MojoMagick - keepin it simple!
+  Thanks for installing MojoMagick - keepin it simple!
 
-*** To make this gem work, you need a few binaries!
-Make sure you've got ImageMagick available.  http://imagemagick.org
-If you plan to build images with text (using the "label" method) you'll need freetype and ghostscript as well.
-Check out http://www.freetype.org and http://ghostscript.com respectively for installation info.
+  *** To make this gem work, you need a few binaries!
+  Make sure you've got ImageMagick available.  http://imagemagick.org
+  If you plan to build images with text (using the "label" method) you'll need freetype and ghostscript as well.
+  Check out http://www.freetype.org and http://ghostscript.com respectively for installation info.
 
 EOF
 
 Gem::Specification.new do |s|
-  s.name        = "mojo_magick"
-  s.license  = 'MIT'
+  s.name = 'mojo_magick'
+  s.license = 'MIT'
   s.version     = MojoMagick::VERSION
   s.platform    = Gem::Platform::RUBY
-  s.authors     = ["Steve Midgley", "Elliot Nelson", "Jon Rogers"]
-  s.email       = ["[e-mail]", "[e-mail]"]
-  s.homepage    = "http://github.com/rcode5/mojo_magick"
+  s.authors     = ['Steve Midgley', 'Elliot Nelson', 'Jon Rogers']
+  s.email       = ['[e-mail]', '[e-mail]']
+  s.homepage    = 'http://github.com/rcode5/mojo_magick'
   s.summary     = "mojo_magick-#{MojoMagick::VERSION}"
-  s.description = %q{Simple Ruby stateless module interface to imagemagick.}
+  s.description = 'Simple Ruby stateless module interface to imagemagick.'
 
-  s.rubyforge_project = "mojo_magick"
+  s.rubyforge_project = 'mojo_magick'
 
   s.files         = `git ls-files`.split("\n")
   s.test_files    = `git ls-files -- {test,features}/*`.split("\n")
-  s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
-  s.require_paths = ["lib"]
+  s.executables   = `git ls-files -- bin/*`.split("\n").map { |f| File.basename(f) }
+  s.require_paths = ['lib']
+  s.add_development_dependency('minitest')
   s.add_development_dependency('rake')
-  s.add_development_dependency('simplecov')
   s.add_development_dependency('rspec-expectations')
+  s.add_development_dependency('simplecov')
 
   s.post_install_message = post_install_message
 end