diff --git a/docs/conf.py b/docs/conf.py
index 7aeeec4b..bd59efa2 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -115,8 +115,8 @@
     use_repository_button=True,
     use_issues_button=True,
     home_page_in_toc=True,
-    extra_footer="<em>The National Center for Atmospheric Research is sponsored by the National Science Foundation. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation.</em>",
-)   # noqa
+    extra_footer="<em>The National Center for Atmospheric Research is sponsored by the National Science Foundation. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation.</em>",  # noqa
+)
 
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
diff --git a/examples/nblibrary/ice/vect_diff.py b/examples/nblibrary/ice/vect_diff.py
index 1c0422e9..80ca09e3 100644
--- a/examples/nblibrary/ice/vect_diff.py
+++ b/examples/nblibrary/ice/vect_diff.py
@@ -67,7 +67,7 @@ def vect_diff(uvel1, vvel1, uvel2, vvel2, angle, proj, case1, case2, TLAT, TLON)
         transform=ccrs.PlateCarree(),
     )
     units = "cm/s"
-    qk = ax.quiverkey(
+    ax.quiverkey(
         Q,
         0.85,
         0.025,