If the filepath ends with space character(s) after the extension, the file created by grunt.file.write had problem on Windows

[chenyingchun]

If the filepath ends with space character(s) after the extension, the file created by grunt.file.write had problem on Windows. The file was created on the file system. When I tried to use Notepad or some other editor to open it, Windows showed "Item Not Found" error. The detail messages were: Could not find this item. This is no longer located in C:/temp/my_file_folder_blabla. Verify the item's location and try again.