* lisp/ob.el: Only use the :wrap argument up to the first space when creating
the #+END_ directive.
Using an option like ":wrap SRC fundamental" was generating and end marker of
"#+END_SRC fundamental", which caused the new exporter to fail to handle to
block properly.
Patch from Michael Gauland.
Bastien Guerry
Nicolas Goaziou
Eric Schulte