add the docs for the sum_of_digits

Author: s2kumar2007

README.md

@@ -58,4 +58,4 @@ Feel free to explore the scripts and use them for your learning and automation n
 43. [smart_file_organizer.py](https://github.com/sangampaudel530/Python2.0/blob/main/smart_file_organizer.py) - Organizes files in a directory into categorized subfolders based on file type (Images, Documents, Videos, Audios, Archives, Scripts, Others). You can run it once or automatically at set intervals using the `--path` and `--interval` options.
 <hr>
 
-_**Note**: The content in this repository belongs to the respective authors and creators. I'm just providing a formatted README.md for better presentation._
+_**Note**: The content in this repository belongs to the respective authors and creators. I'm just providing a formatted README.md for better presentation.

sum_of_digits_of_a_number.py

@@ -49,7 +49,7 @@ def sum_of_digits(n: int) -> int:
     Compute the sum of the digits of an integer.
 
     Args:
-        n:Non - negative integer
+        n:Non-negative integer
         If the integer is negative , it is converted to postive interger and assigned to same number
 
     Returns: