sphinx tips: add subsubsection into pdf compiled by make all-pdf-ja

When sphinx compiles latex files, it chooses cls file which written in conf.py.

# Grouping the document tree into LaTeX files. List of tuples
# (source start file, target name, title, author, documentclass [howto/manual]).
latex_documents =
   ('index', 'sample_document.tex', u'This is sample',
     u'Author Name', 'manual'),
]

If 'manual' is specified in conf.py, sphinx read sphinxmanual.cls when it compiles latex file. So, if you want to enable subsubsection, you should edit sphinxmanual.cls or other specified cls file. In my environment, original sphinxmanual.cls is located in /usr/local/lib/python2.6/dist-packages/Sphinx-1.0.7-py2.6.egg/sphinx/texinputs/sphinxmanual.cls. And you can enable subsubsection with editing this cls file like below.

before:
\setcounter{secnumdepth}{2}

after:
\setcounter{secnumdepth}{3}

enjoy.