* lisp/subr.el (libxml-parse-xml-region)
(libxml-parse-html-region): Adjust the calling convention to note
that the final parameter is optional.
(set-advertised-calling-convention 'unintern '(name obarray) "23.3")
(set-advertised-calling-convention 'indirect-function '(object) "25.1")
(set-advertised-calling-convention 'redirect-frame-focus '(frame focus-frame) "24.3")
-(set-advertised-calling-convention 'libxml-parse-xml-region '(start end base-url) "27.1")
-(set-advertised-calling-convention 'libxml-parse-html-region '(start end base-url) "27.1")
+(set-advertised-calling-convention 'libxml-parse-xml-region '(start end &optional base-url) "27.1")
+(set-advertised-calling-convention 'libxml-parse-html-region '(start end &optional base-url) "27.1")
\f
;;;; Obsolescence declarations for variables, and aliases.