diff --git a/examples/shapes_and_collections/donut.py b/examples/shapes_and_collections/donut.py
index 794cd342b039..9afa26c85e6f 100644
--- a/examples/shapes_and_collections/donut.py
+++ b/examples/shapes_and_collections/donut.py
@@ -1,4 +1,4 @@
-"""
+r"""
 =============
 Mmh Donuts!!!
 =============
diff --git a/lib/matplotlib/artist.py b/lib/matplotlib/artist.py
index c8f9726b0201..83b3e27d3eac 100644
--- a/lib/matplotlib/artist.py
+++ b/lib/matplotlib/artist.py
@@ -1059,7 +1059,7 @@ class ArtistInspector(object):
     """
 
     def __init__(self, o):
-        """
+        r"""
         Initialize the artist inspector with an `Artist` or an iterable of
         `Artist`\s.  If an iterable is used, we assume it is a homogeneous
         sequence (all `Artists` are of the same type) and it is your
diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
index c05db4f3aa5f..5fcf014bf68e 100644
--- a/lib/matplotlib/axes/_axes.py
+++ b/lib/matplotlib/axes/_axes.py
@@ -5267,7 +5267,7 @@ def _pcolorargs(funcname, *args, allmatch=False):
     @docstring.dedent_interpd
     def pcolor(self, *args, alpha=None, norm=None, cmap=None, vmin=None,
                vmax=None, **kwargs):
-        """
+        r"""
         Create a pseudocolor plot with a non-regular rectangular grid.
 
         Call signature::