Use equation_env variable, PEP8 adaptation

converters/latex.py

@@ -34,6 +34,7 b' class ConverterLaTeX(Converter):'
     extension = 'tex'
     documentclass = 'article'
     documentclass_options = '11pt,english'
+    equation_env = 'equation*'
     heading_map = {1: r'\section',
                    2: r'\subsection',
                    3: r'\subsubsection',
@@ -71,7 +72,7 b' class ConverterLaTeX(Converter):'
         # tex file.
 
         # Tag the document at the top and set latex class
-        final = [r'%% This file was auto-generated by IPython, do NOT edit',
+        final = [r'%% This file was auto-generated by IPython.',
                  r'%% Conversion from the original notebook file:',
                  r'%% {0}'.format(self.infile),
                  r'%%',
@@ -133,8 +134,10 b' class ConverterLaTeX(Converter):'
         return lines
 
     def _img_lines(self, img_file):
-        return self.in_env('center',
-                [r'\includegraphics[width=0.7\textwidth]{%s}' % os.path.relpath(img_file, self.infile_dir), r'\par'])
+        rel_img_position = os.path.relpath(img_file, self.infile_dir)
+        return self.in_env('center', 
+            [r'\includegraphics[width=0.7\textwidth]{%s}' % rel_img_position, 
+             r'\par'])
 
     def _svg_lines(self, img_file):
         base_file = os.path.splitext(img_file)[0]
@@ -151,8 +154,8 b' class ConverterLaTeX(Converter):'
 
         # output is a dictionary like object with type as a key
         if 'latex' in output:
-            lines.extend(self.in_env('equation', output.latex.lstrip('$$').rstrip('$$')))
-
+            lines.extend(self.in_env(self.equation_env, 
+                         output.latex.lstrip('$$').rstrip('$$')))
         #use text only if no latex representation is available
         elif 'text' in output:
             lines.extend(self.in_env('verbatim', output.text))
@@ -182,7 +185,8 b' class ConverterLaTeX(Converter):'
         return []
 
     def render_display_format_latex(self, output):
-        return self.in_env('equation', output.latex.lstrip('$$').rstrip('$$'))
+        return self.in_env(self.equation_env, 
+                           output.latex.lstrip('$$').rstrip('$$'))
 
     def render_display_format_json(self, output):
         # latex ignores json