LaTeX export move title and author macros

Patch by Sebastian Hofer

On Nov 28, 2010, at 8:11 PM, Sebastian Hofer wrote:

> Hi,
>
> would it be possible to move the \title, \author, \date commands to
> after \begin{document}?
> This may sound like a stupid suggestion, but some classes (in
> particular revtex - the standard class for journals of the american
> physical society) throw errors otherwise. A possible patch is
> attached. I tested the modification for the standard classes
> (article, report, book and beamer) and they all work fine.
> I'm wondering if Carsten never experienced this problem...
>

lisp/org-latex.el

@@ -1281,6 +1281,8 @@ OPT-PLIST is the options plist for current buffer."
      (org-export-apply-macros-in-string org-export-latex-append-header)
      ;; define alert if not yet defined
      "\n\\providecommand{\\alert}[1]{\\textbf{#1}}"
+     ;; beginning of the document
+     "\n\\begin{document}\n\n"
      ;; insert the title
      (format
       "\n\n\\title{%s}\n"
@@ -1297,8 +1299,6 @@ OPT-PLIST is the options plist for current buffer."
 	     (format-time-string
 	      (or (plist-get opt-plist :date)
 		  org-export-latex-date-format)))
-     ;; beginning of the document
-     "\n\\begin{document}\n\n"
      ;; insert the title command
      (when (string-match "\\S-" title)
        (if (string-match "%s" org-export-latex-title-command)