Fix lint issues.

spec/unit/generator/xcconfig/xcconfig_helper_spec.rb

@@ -198,15 +198,15 @@ module Pod
         describe '::add_language_specific_settings' do
           it 'does not add OTHER_SWIFT_FLAGS to the xcconfig if the target does not use swift' do
             target = stub(:uses_swift? => false)
-            xcconfig = Xcodeproj::Config.new()
+            xcconfig = Xcodeproj::Config.new
             @sut.add_language_specific_settings(target, xcconfig)
             other_swift_flags = xcconfig.to_hash['OTHER_SWIFT_FLAGS']
-            other_swift_flags.should == nil
+            other_swift_flags.should.nil?
           end
 
           it 'does not add the -suppress-warnings flag to the xcconfig if the target uses swift, but does not inhibit warnings' do
             target = stub(:uses_swift? => true, :inhibit_warnings? => false)
-            xcconfig = Xcodeproj::Config.new()
+            xcconfig = Xcodeproj::Config.new
             @sut.add_language_specific_settings(target, xcconfig)
             other_swift_flags = xcconfig.to_hash['OTHER_SWIFT_FLAGS']
             other_swift_flags.should.not.include?('-suppress-warnings')
@@ -214,7 +214,7 @@ module Pod
 
           it 'adds the -suppress-warnings flag to the xcconfig if the target uses swift and inhibits warnings' do
             target = stub(:uses_swift? => true, :inhibit_warnings? => true)
-            xcconfig = Xcodeproj::Config.new()
+            xcconfig = Xcodeproj::Config.new
             @sut.add_language_specific_settings(target, xcconfig)
             other_swift_flags = xcconfig.to_hash['OTHER_SWIFT_FLAGS']
             other_swift_flags.should.include?('-suppress-warnings')