7 * Deprecated usage of a colon in an unquoted mapping value
8 * Deprecated usage of @, \`, | and > at the beginning of an unquoted string
9 * When surrounding strings with double-quotes, you must now escape `\` characters. Not
10 escaping those characters (when surrounded by double-quotes) is deprecated.
27 * Yaml::parse() does not evaluate loaded files as PHP files by default
28 anymore (call Yaml::enablePhpParsing() to get back the old behavior)