Fix rubocop findings

spec/unit/installer_spec.rb

@@ -256,26 +256,26 @@ module Pod
         @file = Pathname('/yolo.m')
         @file.stubs(:realpath).returns(@file)
 
-        @libThing = Pathname('/libThing.a')
-        @libThing.stubs(:realpath).returns(@libThing)
+        @lib_thing = Pathname('/libThing.a')
+        @lib_thing.stubs(:realpath).returns(@lib_thing)
       end
 
       it 'detects transitive static dependencies which are linked directly to the user target' do
-        Sandbox::FileAccessor.any_instance.stubs(:vendored_libraries).returns([@libThing])
+        Sandbox::FileAccessor.any_instance.stubs(:vendored_libraries).returns([@lib_thing])
         @installer = Installer.new(config.sandbox, @podfile, @lockfile)
         should.raise(Informative) { @installer.install! }.message.should.match /transitive.*libThing/
       end
 
       it 'allows transitive static dependencies which contain other source code' do
         Sandbox::FileAccessor.any_instance.stubs(:source_files).returns([@file])
-        Sandbox::FileAccessor.any_instance.stubs(:vendored_libraries).returns([@libThing])
+        Sandbox::FileAccessor.any_instance.stubs(:vendored_libraries).returns([@lib_thing])
         @installer = Installer.new(config.sandbox, @podfile, @lockfile)
         should.not.raise(Informative) { @installer.install! }
       end
 
       it 'allows transitive static dependencies when both dependencies are linked against the user target' do
         PodTarget.any_instance.stubs(:should_build? => false)
-        Sandbox::FileAccessor.any_instance.stubs(:vendored_libraries).returns([@libThing])
+        Sandbox::FileAccessor.any_instance.stubs(:vendored_libraries).returns([@lib_thing])
         @installer = Installer.new(config.sandbox, @podfile, @lockfile)
         should.not.raise(Informative) { @installer.install! }
       end

spec/unit/project_spec.rb

@@ -228,7 +228,7 @@ module Pod
         it 'uses realpath for resolving symlinks' do
           file = Pathname.new(Dir.tmpdir) + 'file.m'
           FileUtils.rm_f(file)
-          File.open(file, 'w') { |file| file.write('') }
+          File.open(file, 'w') { |f| f.write('') }
           sym_file = Pathname.new(Dir.tmpdir) + 'symlinked_file.m'
           FileUtils.rm_f(sym_file)
           File.symlink(file, sym_file)