[InfoPlist] Properly format serialized arrays

Adds a newline after the </array> tag

lib/cocoapods/generator/info_plist_file.rb

@@ -88,7 +88,7 @@ module Pod
         when Array
           output << indent << "<array>\n"
           value.each { |v| serialize(v, output, indentation + 2) }
-          output << indent << '</array>'
+          output << indent << "</array>\n"
         when Hash
           output << indent << "<dict>\n"
           value.to_a.sort_by(&:first).each do |key, v|

spec/unit/generator/info_plist_file_spec.rb

@@ -85,6 +85,23 @@ module Pod
       Xcodeproj::Plist.read_from_path(file)['UIRequiredDeviceCapabilities'].should == %w(arm64)
     end
 
+    it 'properly formats serialized arrays' do
+      generator = Generator::InfoPlistFile.new(mock('Target'))
+      generator.send(:to_plist, 'array' => %w(a b)).should == <<-PLIST
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>array</key>
+  <array>
+    <string>a</string>
+    <string>b</string>
+  </array>
+</dict>
+</plist>
+      PLIST
+    end
+
     it 'uses the specified bundle_package_type' do
       target = mock('Target', :platform => stub(:name => :ios))
       generator = Generator::InfoPlistFile.new(target, :bundle_package_type => :bndl)