Feature request: Cell Metadata
In the ECMA spec ( https://www.ecma-international.org/publications-and-standards/standards/ecma-376/ ), we have this: ![image](/uploads/c78eb26220ff76a8a52cc17732fd4111/image.png) When writing some formulas using openpyxl 3.1 with `ArrayFormula`, it ends up as [CSE](https://exceljet.net/glossary/cse) formulas, which is sometimes what I want: ![image](/uploads/e6c874980e928c4afde98a768322e079/image.png) However, sometimes I just want this, while still using `ArrayFormula` (to prevent unwanted `@` from being added): ![image](/uploads/71e5534759676fda5a1e2509adcace9e/image.png) The difference in the XML is as follows: ![image](/uploads/01e24a285d4dc8cf45e522e74a2caa37/image.png) The attribute `cm=1` probably refers to this bit in `metadata.xml` ![image](/uploads/489d58d5d22c4ba073023716b64493ef/image.png) In summary, I would like to somehow write this metadata using openpyxl, so that I can have array formulas without [CSE](https://exceljet.net/glossary/cse).
issue