In every \, \, \, \, \, \, and \ element, if there is an "ascii" attribute and the value of that attribute is the same as the content of the element, remove the "ascii" element and issue a warning about the removal.
I assume it's an oversight that \ and \ are missing?
https://www.greenbytes.de/tech/webdav/rfc7998.html#rfc.section.5.3.2
I assume it's an oversight that \ and \ are missing?