Update Demo Mode messages for assert_attribute()

Author: mdmintz

seleniumbase/fixtures/base_case.py

@@ -6156,15 +6156,15 @@ def assert_attribute(
                 a_a = SD.translate_assert_attribute(self._language)
                 i_n = SD.translate_in(self._language)
             if not value:
-                messenger_post = "%s: {%s} %s %s: %s" % (
+                messenger_post = "%s: [%s] %s %s: %s" % (
                     a_a,
                     attribute,
                     i_n,
                     by.upper(),
                     selector,
                 )
             else:
-                messenger_post = '%s: {%s == "%s"} %s %s: %s' % (
+                messenger_post = '%s: [%s="%s"] %s %s: %s' % (
                     a_a,
                     attribute,
                     value,