css: Use monospace font for Scheme code.

diff --git a/assets/css/screen.css b/assets/css/screen.css
index d26f91e6556da5bd674d8791d6d0c0ee3596ab6e..4bbcfb7fc4d9c9de2ee3a71b57a8264ce5021696 100644 (file)
--- a/assets/css/screen.css
+++ b/assets/css/screen.css
@@ -153,6 +153,7 @@ table {
 
 .multipart.scheme {
     white-space: pre-wrap;
+    font-family: monospace;
 }
 
 .attachment:before {