pugixml-1.10 is out. This is a maintenance release that fixes some compatibility issues and introduces several formatting features (read the changelog for details).
Highlights for this release include:
format_skip_control_charsformatting flag to skip non-printable ASCII characters
format_attribute_single_quoteformatting flag to use single quotes for attribute values
You can download the source package or get the new version from GitHub using the latest tag (https://github.com/zeux/pugixml).