cosmetics

diff --git a/docs/source/_ext/showfile.css b/docs/source/_ext/showfile.css
index 1e3b831..767b723 100644 (file)
--- a/docs/source/_ext/showfile.css
+++ b/docs/source/_ext/showfile.css
@@ -15,11 +15,11 @@
 .toggle-header strong {color: #2980b9 }
 
 .toggle-header:after {
-    content: " â\96¼";
+    content: " â¯\87";
 }
 
 .toggle-header.open:after {
-    content: " â¯\87";
+    content: " â\96¼";
 }
 
 .toggle-content {