[gtksourceview] tests: add example sql file

[Christian Hergert <chergert src gnome org>]

commit f76fb924e2215c254979933b717d82480405a872
Author: Christian Hergert <chergert redhat com>
Date:   Mon Jun 22 14:43:41 2020 -0700

    tests: add example sql file

 tests/syntax-highlighting/file.sql | 11 +++++++++++
 1 file changed, 11 insertions(+)
---
diff --git a/tests/syntax-highlighting/file.sql b/tests/syntax-highlighting/file.sql
new file mode 100644
index 00000000..a9c639f4
--- /dev/null
+++ b/tests/syntax-highlighting/file.sql
@@ -0,0 +1,11 @@
+-- this is a comment
+
+INSERT INTO table_name (column1, column2, column3, ...)
+VALUES (value1, value2, value3, ...);
+
+BEGIN;
+       UPDATE table_name
+       SET balance = balance - 100.0
+       WHERE account_id = '123';
+-- more comment
+COMMIT;