saving workbook incorrectly converts empty strings to blank cells
When reading workbooks blank cells are loaded as None and cells containing empty strings are loaded as empty strings. But when saving a workbook all the empty strings are converted to blank cells. This inconsistent behaviour causes a workbook to change when it is read and then saved because all empty strings are lost.
If for some weird reason this bug is intentional, can we at least get the option to disable it? If not can you at least tell me where in your code this conversion happens so I can fix it locally?