Don't sort pdf dicts.

anntzer · anntzer · commit 600a8af5f18d · 2021-11-25T20:48:53.000+01:00
As for svg (10145a2), this makes outputs marginally easier to read, and is not necessary anymore now that dicts maintain insertion order.
diff --git a/lib/matplotlib/backends/backend_pdf.py b/lib/matplotlib/backends/backend_pdf.py
@@ -297,8 +297,7 @@ def pdfRepr(obj):
     elif isinstance(obj, dict):
         return fill([
             b"<<",
-            *[Name(key).pdfRepr() + b" " + pdfRepr(obj[key])
-              for key in sorted(obj)],
+            *[Name(k).pdfRepr() + b" " + pdfRepr(v) for k, v in obj.items()],
             b">>",
         ])
 
