* (org-latex-verse-block): Now the treatment of blank lines is
consistent with the syntax of the LaTeX `verse' environment, and the
one provided by the `verse' package. If the `:literal' attribute is
used, all blank lines are preserved and exported as
`\vspace*{\baselineskip}', including the blank lines before or after
contents. The rx code has been suggested by Ihor Radchenko, to
improve readability.
* doc/org-manual.org (Verse blocks in LaTeX export): The new feature
is documented.
* testing/lisp/test-ox-latex.el (test-ox-latex/verse): Updated.