From 6901e1cb7899822d89b5968a927a829a47c44c34 Mon Sep 17 00:00:00 2001
From: Tim Hoffmann <2836374+timhoffm@users.noreply.github.com>
Date: Mon, 9 Sep 2019 01:34:51 +0200
Subject: [PATCH] Doc: Do not write default for non-existing rcParams

---
 doc/sphinxext/custom_roles.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/doc/sphinxext/custom_roles.py b/doc/sphinxext/custom_roles.py
index 88dddb6a2e4b..18f9144d9000 100644
--- a/doc/sphinxext/custom_roles.py
+++ b/doc/sphinxext/custom_roles.py
@@ -4,8 +4,12 @@
 
 
 def rcparam_role(name, rawtext, text, lineno, inliner, options={}, content=[]):
-    param = rcParamsDefault.get(text)
-    rendered = nodes.Text(f'rcParams["{text}"] = {param!r}')
+    try:
+        default_str = f' = {rcParamsDefault[text]!r}'
+    except KeyError:
+        # handling of generic references such as rcParams["figure.subplot.*"]
+        default_str = ''
+    rendered = nodes.Text(f'rcParams["{text}"]' + default_str)
 
     source = inliner.document.attributes['source'].replace(sep, '/')
     rel_source = source.split('/doc/', 1)[1]