Fix backend in matplotlibrc if unset in mplsetup.cfg

QuLogic · QuLogic · commit 40fb7764c328 · 2022-03-03T23:52:19.000-05:00
As reported in #21660 (comment)
diff --git a/setup.py b/setup.py
@@ -201,7 +201,7 @@ def update_matplotlibrc(path):
     template_lines[backend_line_idx] = (
         "#backend: {}\n".format(setupext.options["backend"])
         if setupext.options["backend"]
-        else "##backend: Agg")
+        else "##backend: Agg\n")
     path.write_text("".join(template_lines))
 
 
