📚 Fix inconsistencies in code snippets

Author: mbercx

docs/documentation.md

@@ -207,7 +207,7 @@ This command:
 Your documentation will be available at:
 
 ```
-https://<username>.github.io/dev-tutorial-<username>/
+https://<YOUR_USERNAME>.github.io/dev-tutorial-<YOUR_USERNAME>/
 ```
 
 For example, this documentation is hosted at: [https://mbercx.github.io/softdev-101/](https://mbercx.github.io/softdev-101/)

docs/formatting.md

@@ -119,7 +119,7 @@ ruff check
 
 ```console {.no-copy}
 F841 Local variable `debug_mode` is assigned to but never used
- --> src/dev_tutorial_<YOUR_USERNAME>/messy_code.py:3:5
+ --> src/dev_tutorial_<YOUR_USERNAME>/messy.py:3:5
   |
 1 | def calculate_statistics(data, include_median=True):
 2 |     """Calculate statistics for a list of numbers."""

docs/tests.md

@@ -92,7 +92,7 @@ Here's a simple example testing the `add` function from `tests/test_functions.py
 
 ```python
 # tests/test_functions.py
-from dev_tutorial.functions import add
+from dev_tutorial_<YOUR_USERNAME>.functions import add
 
 def test_add():
     """Test the `add` function."""
@@ -126,7 +126,7 @@ def list_of_integers():
 
 ```python
 # tests/test_functions.py
-from dev_tutorial.functions import sum_and_multiply
+from dev_tutorial_<YOUR_USERNAME>.functions import sum_and_multiply
 
 def test_fixture(list_of_integers):
     """Test the `sum_and_multiply` function using the `list_of_integers` fixture."""