Corrected 'possibly' to 'possible

Author: MarkRosemaker

reference/concepts/type_hinting.md

@@ -2,4 +2,4 @@
 
 TODO: ADD MORE
 
-- In modern Python it's possibly to type hint annotations to parameters and variables, see [typing](https://docs.python.org/3/library/typing.html#module-typing). While not necessary in Python such annotations can help your code be easier to read, understand, and check automatically using tools like `mypy`. [reverse-string](../exercise-concepts/reverse-string.md)
+- In modern Python it's possible to type hint annotations to parameters and variables, see [typing](https://docs.python.org/3/library/typing.html#module-typing). While not necessary in Python such annotations can help your code be easier to read, understand, and check automatically using tools like `mypy`. [reverse-string](../exercise-concepts/reverse-string.md)

reference/exercise-concepts/reverse-string.md

@@ -31,4 +31,4 @@ def reverse(text: str = "") -> str:
     [Extra material for string slicing.](https://www.digitalocean.com/community/tutorials/how-to-index-and-slice-strings-in-python-3)
 
 - [Docstrings][docstrings]: used to document the function, normally situated right below `def func():`
-- [Type hinting][type-hinting]: In modern Python it's possibly to type hint annotations to parameters and variables, see [typing](https://docs.python.org/3/library/typing.html#module-typing). While not necessary in Python such annotations can help your code be easier to read, understand, and check automatically using tools like `mypy`.
+- [Type hinting][type-hinting]: In modern Python it's possible to type hint annotations to parameters and variables, see [typing](https://docs.python.org/3/library/typing.html#module-typing). While not necessary in Python such annotations can help your code be easier to read, understand, and check automatically using tools like `mypy`.