Add slide to prevent errors

lectures/debugging-strategies/slides.qmd

@@ -520,6 +520,14 @@ issues in line 9 and 13
  - Create minimal working example
  - Use debugger
 
+
+## Prevent errors
+
+ - Testing!
+ - Using linters (static code analysis) like [ruff](https://github.com/astral-sh/ruff) for Python
+ - Even ensure proper formatting with tools like [black](https://github.com/psf/black) for Python
+ - Consider using an IDE with its tools
+
  
 # Errors due to data access and communication