Whoops, missed inheritance when s/book/report

IPython/nbconvert/templates/latex/latex_article_simple.tplx

@@ -0,0 +1,2 b''
+((* set cell_style = 'simple_style.tplx' *))
+((* extends 'latex_article.tplx' *))
  No newline at end of file

IPython/nbconvert/templates/latex/latex_sphinx_report.tplx

@@ -1,38 +1,38 b''
-((* extends 'latex_book.tplx' *))
+((* extends 'latex_report.tplx' *))
 
 %===============================================================================
 % Latex Sphinx Book
 %===============================================================================
 
 ((* block docclass *))
     % Make sure that the sphinx doc style knows who it inherits from.
     \def\sphinxdocclass{report}
 
     % Declare the document class
     \documentclass[letterpaper,10pt,english]{((( resources.sphinx.texinputs | posix_path )))/sphinxmanual}
 ((* endblock docclass *))
 
 ((* block packages *))
     ((* block chstyle *))
     \usepackage[Bjarne]{((( resources.sphinx.texinputs | posix_path )))/fncychap}
     ((* endblock chstyle *))
 
     \usepackage{((( resources.sphinx.texinputs | posix_path )))/sphinx}
 
     ((( super() )))
 ((* endblock packages *))    
 
 ((* block commands *))
     ((( super() )))
 
     % Override to specify your own logo
     ((* block logo *))\newcommand{\sphinxlogo}{}((* endblock logo *))
 
     % Make the index page of the document.
     \makeindex
 
 ((* endblock commands *))
 
 % Work around to fix vertical spacing issues with the notebook style.
 ((* block extra_input_spacing *))\vspace{-1\baselineskip}((* endblock extra_input_spacing *))
 ((* block extra_output_spacing *))\vspace{-0.6\baselineskip}((* endblock extra_output_spacing *))