[tepl] docs: roadmap-done: add TeplSpaceDrawerPrefs

[Sébastien Wilmet <swilmet src gnome org>]

commit 3671a6cc3deb04ffe940e2a1326830d94b060156
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Tue Oct 6 17:15:29 2020 +0200

    docs: roadmap-done: add TeplSpaceDrawerPrefs

 docs/roadmap-done.md | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/docs/roadmap-done.md b/docs/roadmap-done.md
index 4469c9d..4b79007 100644
--- a/docs/roadmap-done.md
+++ b/docs/roadmap-done.md
@@ -1,6 +1,11 @@
 Tepl roadmap - done tasks
 =========================
 
+New small features in Tepl 5.2 (GNOME 40)
+-----------------------------------------
+
+- TeplSpaceDrawerPrefs: preferences widget for GtkSourceSpaceDrawer.
+
 New small features in Tepl 5.0 (GNOME 3.38)
 -------------------------------------------