https://formula.dog/journal/code-refactoring-techniques-cleaner-spreadsheets 2026-06-30 https://formula.dog/journal/tag/code-refactoring 2026-06-30 https://formula.dog/journal/tag/excel-formulas 2026-06-30 https://formula.dog/journal/tag/spreadsheet-tips 2026-06-30 https://formula.dog/journal/tag/clean-code 2026-06-30 https://formula.dog/journal/author/anika-johansdottir 2026-06-30