refactor(tests): update sample_file.txt with newline character

Ahmedhossamdev · Ahmedhossamdev · commit f0d76443778e · 2024-07-07T02:56:22.000+03:00
diff --git a/tests/sample_file.txt b/tests/sample_file.txt
@@ -1 +1 @@
-Hello, world!
+Hello, world!\n
