Fixed a bug where a nested sum would return 0 rather than an error in C code
Cleaned up examples folder
If a range points to a single cell, then that is used rather than a range
Remove obsolete error handling code from multiply.rb
INDEX now returns zero, not blank, when pointing to an empty cell
Test for arithmetic operator precedence
Enure that simplifyarithmetic is applied to the results of INDIRECT functions
Now writes tests out so that the cells that are referenced the most are at the top. This should mean that the first tests to fail are the first spots to investigate.
Ensure tha tests can be put in sorted order even when no cells to keep on a sheet
Change C test output to force the use of minitest and to make sure tests are run in the order they are defined