Fixed #27900 -- Made escapejs escape backticks for use in ES6 template literals.

django/utils/html.py

@@ -58,6 +58,7 @@ _js_escapes = {
     ord('='): '\\u003D',
     ord('-'): '\\u002D',
     ord(';'): '\\u003B',
+    ord('`'): '\\u0060',
     ord('\u2028'): '\\u2028',
     ord('\u2029'): '\\u2029'
 }

tests/utils_tests/test_html.py

@@ -140,6 +140,7 @@ class TestUtilsHtml(SimpleTestCase):
                 'paragraph separator:\u2029and line separator:\u2028',
                 'paragraph separator:\\u2029and line separator:\\u2028'
             ),
+            ('`', '\\u0060'),
         )
         for value, output in items:
             with self.subTest(value=value, output=output):