Verse construct generates invalid LaTeX code

[Antti Kaihola <akaihol+emacs@ambitone.com>]

Here's an example file:


-----------------------------versetest.org
Test case for verse bug

#+BEGIN_VERSE
This is
the first stanza.

This is
the second stanza.
#+END_VERSE
-----------------------------versetest.org


It generates the following LaTeX code with the C-c C-e L command
(excerpt with line numbers added):


-----------------------------versetest.tex
22: \begin{verse}
23: This is\\
24: the first stanza.\\
25: \\
26: This is\\
27: the second stanza.\\
28: \end{verse}
-----------------------------versetest.tex


When compiled with pdflatex, it causes this error:


-----------------------------pdflatex output
! LaTeX Error: There's no line here to end.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.25 \\
-----------------------------pdflatex output


Org-mode probably instructs pdflatex to ignore errors since C-c C-e d
compiles the .org file just fine, just without any break between
the stanzas.

Edition 1.6 of the LaTeX2e documentation states:

  Separate the lines of each stanza with \\, and use one or more blank
  lines to separate the stanzas,

so the correct LaTeX output would be:


-----------------------------corrected versetest.tex
22: \begin{verse}
23: This is\\
24: the first stanza.
25: 
26: This is\\
27: the second stanza.
28: \end{verse}
-----------------------------corrected versetest.tex