[py] Fix return type hint for alert_is_present (#16975)

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Co-authored-by: Corey Goldberg <1113081+cgoldberg@users.noreply.github.com>

Author: 2 people

py/selenium/webdriver/support/expected_conditions.py

@@ -692,19 +692,16 @@ def _predicate(driver: WebDriver):
     return _predicate
 
 
-def alert_is_present() -> Callable[[WebDriver], Alert | bool]:
+def alert_is_present() -> Callable[[WebDriver], Alert | Literal[False]]:
     """Check that an alert is present and switch to it.
 
     Returns:
-        The Alert once it is located.
+        The Alert once it is located, or False if no alert is present.
 
     Example:
         from selenium.webdriver.support.ui import WebDriverWait
         from selenium.webdriver.support import expected_conditions as EC
         alert = WebDriverWait(driver, 10).until(EC.alert_is_present())
-
-    Note:
-        If the alert is present it switches the given driver to it.
     """
 
     def _predicate(driver: WebDriver):