Fix typos

Author: gjbex

source-code/error-handling/README.md

@@ -8,5 +8,5 @@ Illustrations of error handling.
    ways ot handle errors.
 1. `data.txt`: data file to use as input.
 1. `data_not_ok.txt`: incorrect data file to use as input.
-1. `warnings`: illustrations of using the `warmings` module
+1. `warnings`: illustrations of using the `warnings` module
    for error handling.

source-code/testing/Hypothesis/README.md

@@ -6,7 +6,7 @@ uses fuzzing to find issues in your code.
 
 ## What is it?
 
-1. `factorial.py`: implementatino of the factorial
+1. `factorial.py`: implementation of the factorial
    function.
 1. `test_factorial.py`: hypothesis tests of the factorial
    function