Whitespace at the start of a formula line causes a parse error

[Xkeeper0]

As title says. A single space at the start of a formula comment line will cause a parse error. (Extra spaces at the end of the line are ignored, though.)

| Item              | Grams |
| ----------------- | ----- |
| Whole Wheat Flour | 110   |
| Bread Flour       | 748   |
| Warm Water        | 691   |
| Salt              | 18    |
| Starter           | 40    |
| **Total Grams**   | 1607  |
 <!-- TBLFM: @>$2=sum(@I..@-1) -->

This can be particularly devious because in some fonts and settings, the problem may not be immediately obvious. Even the "Home" button won't make it clear what's wrong, since one press jumps to the start of text, rather than the start of the line.

Ran into this one while trying to copy-paste just the sum example from the documentation, since I already had the table.