same on each side. Make sure we properly handle simple quotes.
From Daiki Ueno <ueno@unixuser.org>.
;; Do we have a string between quotes (or double-quotes),
;; or a simple word ?
(unless (looking-at "\"\\([^\"]+\\)\"")
- (unless (looking-at "'\\([^\"]+\\)'")
+ (unless (looking-at "'\\([^']+\\)'")
(error "XML: Attribute values must be given between quotes")))
;; Each attribute must be unique within a given element