emulation has changed from 0-based indexing to 1-based like gnu readline.
Original patch by Ronald Oussoren.

("make smelly" now clean)

failed, second invocation of close() and destructor no more raise an
exception.

Initial wording proposed by John Roth.

Closes #19179: make table of XML vulnerabilities clearer by using "everyday" booleans and explaining the table beforehand.

compressed streams.

compressed streams.