Ensure file descriptors are closed

lib/cocoapods/command/spec.rb

@@ -207,7 +207,7 @@ module Pod
             get_path_of_spec(@spec)
           end
 
-          UI.puts File.open(filepath).read
+          UI.puts File.read(filepath)
         end
       end
 

spec/integration.rb

@@ -186,8 +186,8 @@ end
 #        The file in the temporary directory after running the pod command.
 #
 def yaml_should_match(expected, produced)
-  expected_yaml = YAML::load(File.open(expected))
-  produced_yaml = YAML::load(File.open(produced))
+  expected_yaml = File.open(expected) { |f| YAML.load(f) }
+  produced_yaml = File.open(produced) { |f| YAML.load(f) }
   # Remove CocoaPods version
   expected_yaml.delete('COCOAPODS')
   produced_yaml.delete('COCOAPODS')