doc: remove extraneous character (#1744)

jimthompson5802 · holly1238 · web-flow · commit 640d55ce6313 · 2021-11-15T14:13:52.000-08:00
Co-authored-by: Holly Sweeney &lt;77758406+holly1238@users.noreply.github.com&gt;
diff --git a/beginner_source/examples_autograd/polynomial_custom_function.py b/beginner_source/examples_autograd/polynomial_custom_function.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-r"""
+"""
 PyTorch: Defining New autograd Functions
 ----------------------------------------
 

-Original file line number
+Diff line change
@@ @@ -1,5 +1,5 @@ @@
 # -*- coding: utf-8 -*-
 -r"""
 +"""
 PyTorch: Defining New autograd Functions
 ----------------------------------------