diff --git a/doc/conf.py b/doc/conf.py
index 16bb12b7c21b5bd0ea6964e72264816313f47712..5287a31a52f89c163cb1924da6f75365dc04705a 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -33,7 +33,7 @@ extensions = [
     "sphinx.ext.intersphinx",
     "sphinx.ext.coverage",
     "sphinx.ext.mathjax",
-    #'sphinx.ext.viewcode'
+    # 'sphinx.ext.viewcode'
 ]
 
 # Add any paths that contain templates here, relative to this directory.
@@ -199,11 +199,11 @@ htmlhelp_basename = "pymbolicdoc"
 
 latex_elements = {
     # The paper size ('letterpaper' or 'a4paper').
-    #'papersize': 'letterpaper',
+    # 'papersize': 'letterpaper',
     # The font size ('10pt', '11pt' or '12pt').
-    #'pointsize': '10pt',
+    # 'pointsize': '10pt',
     # Additional stuff for the LaTeX preamble.
-    #'preamble': '',
+    # 'preamble': '',
 }
 
 # Grouping the document tree into LaTeX files. List of tuples