Fix typo in functions

Author: rsokl

Python/Module2_EssentialsOfPython/Functions.md

@@ -244,7 +244,7 @@ This should be used sparingly, for exceedingly simple functions that can be easi
 
 <!-- #region -->
 ## Arguments
-A sequence of comma-separated variable names can specified in the function signature to indicated *positional* arguments for the function. For example, the following specifies `x`, `lower`, and `upper` as input arguments to a function, `is_bounded`:
+A sequence of comma-separated variable names can be specified in the function signature to indicated *positional* arguments for the function. For example, the following specifies `x`, `lower`, and `upper` as input arguments to a function, `is_bounded`:
 
 ```python
 def is_bounded(x, lower, upper):