fixup! Add --assert-config option

Author: frenzymadness

README.rst

@@ -37,10 +37,10 @@ The ``tox-current-env`` plugin adds these options:
     This option only exists with tox 4 and requires at least tox 4.22.
 
 ``tox --assert-config``
-    Starting with tox 4, tox does not terminate when no configuration is found.
-    This option makes tox fail (raise an exception) when no configuration exists.
-    On tox 3, this option does nothing, but can be used.
-    This option can be combined with others.
+    In tox 4, this option ensures that tox fails (raises an exception) if no configuration is found.
+    By default, tox 4 does not terminate when no configuration exists.
+    In tox 3, this option has no effect, but it can still be specified without causing errors.
+    This option can be used alongside other options.
 
 It is possible to use the three printing options together, as long as the ``FILE`` is different.