[RuboCop] USe single-quoted strings

spec/unit/project_spec.rb

@@ -414,7 +414,7 @@ module Pod
             'My Awesome Configuration', :release)
           settings = configuration.build_settings
           settings['GCC_PREPROCESSOR_DEFINITIONS'].should ==
-            ['POD_CONFIGURATION_MY_AWESOME_CONFIGURATION=1', "$(inherited)"]
+            ['POD_CONFIGURATION_MY_AWESOME_CONFIGURATION=1', '$(inherited)']
         end
 
         it 'transforms camel-cased configuration names to snake case' do
@@ -422,7 +422,7 @@ module Pod
             'MyAwesomeConfiguration', :release)
           settings = configuration.build_settings
           settings['GCC_PREPROCESSOR_DEFINITIONS'].should ==
-            ['POD_CONFIGURATION_MY_AWESOME_CONFIGURATION=1', "$(inherited)"]
+            ['POD_CONFIGURATION_MY_AWESOME_CONFIGURATION=1', '$(inherited)']
         end
 
         it 'adds DEBUG for configurations based upon :debug' do
@@ -430,7 +430,7 @@ module Pod
             'Config', :debug)
           settings = configuration.build_settings
           settings['GCC_PREPROCESSOR_DEFINITIONS'].should ==
-            ["POD_CONFIGURATION_CONFIG=1", "DEBUG=1", "$(inherited)"]
+            ['POD_CONFIGURATION_CONFIG=1', 'DEBUG=1', '$(inherited)']
         end
       end
     end