Fixed #23768 -- Rewrote template tests as unit tests.

tests/template_tests/syntax_tests/test_multiline.py

@@ -0,0 +1,21 @@
+from django.test import TestCase
+
+from .utils import render, setup
+
+
+multiline_string = """
+Hello,
+boys.
+How
+are
+you
+gentlemen.
+"""
+
+
+class MultilineTests(TestCase):
+
+    @setup({'multiline01': multiline_string})
+    def test_multiline01(self):
+        output = render('multiline01')
+        self.assertEqual(output, multiline_string)