* lisp/progmodes/ruby-mode.el (ruby-font-lock-keywords): Fontify

multiple adjacent negation chars.

Fixes: debbugs:17004

lisp/ChangeLog

@@ -1,3 +1,8 @@
+2014-03-13  Dmitry Gutov  <dgutov@yandex.ru>
+
+	* progmodes/ruby-mode.el (ruby-font-lock-keywords): Fontify
+	multiple adjacent negation chars.  (Bug#17004)
+
 2014-03-13  Tom Willemse  <tom@ryuslash.org>  (tiny change)
 
 	* emacs-lisp/package.el (package--prepare-dependencies):

lisp/progmodes/ruby-mode.el

@@ -2127,7 +2127,7 @@ See `font-lock-syntax-table'.")
     (ruby-match-expression-expansion
      2 font-lock-variable-name-face t)
     ;; Negation char.
-    ("[^[:alnum:]_]\\(!\\)[^=]"
+    ("\\(?:^\\|[^[:alnum:]_]\\)\\(!+\\)[^=]"
      1 font-lock-negation-char-face)
     ;; Character literals.
     ;; FIXME: Support longer escape sequences.