Fix some docstrings

Patch by David Maus.

lisp/ChangeLog

@@ -1,5 +1,8 @@
 2010-03-26  Carsten Dominik  <carsten.dominik@gmail.com>
 
+	* org-exp.el (org-export-author-info, org-export-email-info): Fix
+	docstrings.
+
 	* org-beamer.el (org-beamer-select-environment): Renamed from
 	`org-beamer-set-environment-tag'.  Improve docstring.
 

lisp/org-exp.el

@@ -312,7 +312,7 @@ headline  Only export the headline, but skip the tree below it."
   "Non-nil means insert author name and email into the exported file.
 
 This option can also be set with the +OPTIONS line,
-e.g. \"author-info:nil\"."
+e.g. \"author:nil\"."
   :group 'org-export-general
   :type 'boolean)
 
@@ -320,7 +320,7 @@ e.g. \"author-info:nil\"."
   "Non-nil means insert author name and email into the exported file.
 
 This option can also be set with the +OPTIONS line,
-e.g. \"email-info:t\"."
+e.g. \"email:t\"."
   :group 'org-export-general
   :type 'boolean)