From b8a9f2f228c5c706b7524b0941be15c766320aff Mon Sep 17 00:00:00 2001
From: David Adam <zanchey@ucc.gu.uwa.edu.au>
Date: Tue, 26 Nov 2019 18:17:20 +0800
Subject: [PATCH] docs: restore compatibility with Sphinx < 1.8.0

---
 sphinx_doc_src/conf.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sphinx_doc_src/conf.py b/sphinx_doc_src/conf.py
index dc06c190d..a83dee80a 100644
--- a/sphinx_doc_src/conf.py
+++ b/sphinx_doc_src/conf.py
@@ -29,7 +29,11 @@ def setup(app):
         os.path.join(this_dir, "fish_indent_lexer.py"), lexername="FishIndentLexer"
     )
     lexers["fish-docs-samples"] = fish_indent_lexer
-    app.add_css_file("custom.css")
+    # add_css_file only appears in Sphinx 1.8.0
+    if hasattr(app, "add_css_file"):
+        app.add_css_file("custom.css")
+    else:
+        app.add_stylesheet("custom.css")
 
 
 # The default language to assume