fixing typo on org-8.0 latex and beamer attribute options

org-8.0.org

@@ -239,8 +239,8 @@ See the [[http://orgmode.org/manual/Table-of-contents.html][Table of contents]]
 
 - Attribute lines now take plists (similar to [[http://orgmode.org/worg/org-contrib/babel/][Babel code block syntax]]):
 
-   : #+attr_latex :width 5cm
-   : #+attr_beamer :options width=5cm
+   : #+attr_latex: :width 5cm
+   : #+attr_beamer: :options width=5cm
    : #+attr_html: :width 200px
 
   *TIP:* To upgrade from old =attr_html= lines with verbatim HTML