Markup does not fail on missing placeholder

[mart-e]

In the scenario of a missing single placeholder, the mod operator did
not fail as it does when having multiple placeholder

How to reproduce:

>>> Markup("foo") % 42
Markup("foo")
>>> Markup("foo") % (42, 43)
TypeError: not all arguments converted during string formatting
>>> Markup("foo") % (42,)
TypeError: not all arguments converted during string formatting

Expected behavior:
Fail on the three code snippets, as when using native strings.

Environment:

• Python version: 3.9.5
• MarkupSafe version: 1.1.0