[gtksourceview/bilelmoussaoui/for-master] docs: Enable show source

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

commit 8ecca4100c238a991cfd32e849b2e0951c139354
Author: Bilal Elmoussaoui <bil elmoussaoui gmail com>
Date:   Sat Feb 5 16:07:35 2022 +0000

    docs: Enable show source

 docs/GtkSource.toml.in | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/docs/GtkSource.toml.in b/docs/GtkSource.toml.in
index 6ce85092..8ea57b2b 100644
--- a/docs/GtkSource.toml.in
+++ b/docs/GtkSource.toml.in
@@ -52,6 +52,9 @@ name = "basic"
 show_index_summary = true
 show_class_hierarchy = true
 
+[source-location]
+base_url = "https://gitlab.gnome.org/GNOME/gtksourceview/-/blob/master/";
+
 [extra]
 # The same order will be used when generating the index
 content_files = [