Markus Groissböck contributed to the PyPSA/pypsa-eur repository by improving the accuracy and clarity of its documentation, specifically around connectivity checks. He identified that the has_internet_access function in common.smk was incorrectly documented as checking Google rather than Zenodo, and corrected this to reflect the actual implementation. Using Python and applying code refactoring and documentation skills, Markus aligned the function’s documentation with its true behavior, reducing potential confusion for users and lowering support overhead. His targeted bug fix enhanced maintainability and ensured that the documentation now accurately represents the code’s connectivity logic, demonstrating careful attention to detail and process.