* contrib/lisp/ox-koma-letter.el (org-koma-letter-template): Allow to
span documentclass options accross multiple lines in template.
* lisp/ox-beamer.el (org-beamer-template): Allow to span documentclass
options accross multiple lines in template.
* lisp/ox-latex.el (org-latex-template): Allow to span documentclass
options accross multiple lines in template.
Thanks to Michael Strey for reporting this bug.