little-sisters-vocab: Update stub to match instructions (#3489)

Tiny tweak based on https://forum.exercism.org/t/little-sisters-vocabulatry-discrepency-between-test-and-docstring-for-adjective-to-verb/6949/3
exercism · Aug 18, 2023 · 1d8b11a · 1d8b11a
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commit 1d8b11a
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/exercises/concept/little-sisters-vocab/strings.py b/exercises/concept/little-sisters-vocab/strings.py
@@ -48,7 +48,7 @@ def adjective_to_verb(sentence, index):
     :param index: int - index of the word to remove and transform.
     :return: str - word that changes the extracted adjective to a verb.
 
-    For example, ("It got dark as the sun set", 2) becomes "darken".
+    For example, ("It got dark as the sun set.", 2) becomes "darken".
     """
 
     pass