[gtksourceview] rst.lang: add new examples

[Christian Hergert <chergert src gnome org>]

commit 3eb4b337acb7f0151c738df2828d5218670a7743
Author: Christian Hergert <chergert redhat com>
Date:   Tue Oct 19 15:28:20 2021 -0700

    rst.lang: add new examples

 tests/syntax-highlighting/file.rst | 12 ++++++++++++
 1 file changed, 12 insertions(+)
---
diff --git a/tests/syntax-highlighting/file.rst b/tests/syntax-highlighting/file.rst
index a88217fa..98c587ba 100644
--- a/tests/syntax-highlighting/file.rst
+++ b/tests/syntax-highlighting/file.rst
@@ -29,3 +29,15 @@ This is a sentence with a `http-link <http://www.wikipedia.org/>`_, a `https-lin
 .. math::
 
   \lambda = \lambda_{0} + \arctan \left[ \frac{x}{-y} \right]
+
+`This is the
+first item`
+
+`This is the
+second item`_
+
+`This is the
+third item`_
+
+`This is the
+fourth item`