I have a text cell containing text with an apostrophe, and to the right of it another text cell containing a numeric digit. The right cell has a small green triangle in its upper left-hand corner,
and when I click on it the cell to the left (one with apostrophe) displays a message saying "The number in this cell is formatted as text or is preceded by an apostrophe." What is the meaning of the
green triangle?

Thanks,
Don