fdo#75950: Add test for this.

Change-Id: I92253daf4793b50eb2928a1e368fa6231d2f285a
fdo#75950: Just set the right grammar and be done with it.

Using the Excel A1 syntax with custom opcode was probably a hack back
in the day.  These days we can just set the right grammar and expect the
compiler to do the right thing.

Change-Id: Iae98f9f09a7da0b7b9549e06308d5d313bbff1ea