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-rw-r--r--doc/build/conf.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/build/conf.py b/doc/build/conf.py
index a6e95a8..a2010ba 100644
--- a/doc/build/conf.py
+++ b/doc/build/conf.py
@@ -252,7 +252,7 @@ latex_documents = [
# Additional stuff for the LaTeX preamble.
# sets TOC depth to 2.
-latex_preamble = "\setcounter{tocdepth}{3}"
+latex_preamble = r"\setcounter{tocdepth}{3}"
# Documents to append as an appendix to all manuals.
# latex_appendices = []