The overall change is to add cell renaming, that is
setting fancy names for cell symbols other than name matching "\\`[A-Z]+[0-9]+\\'" regexp . (ses-create-cell-variable): New defun. (ses-relocate-formula): Relocate formulas only for cells the symbols of which are not renamed, i.e. symbols whose names do not match regexp "\\`[A-Z]+[0-9]+\\'". (ses-relocate-all): Relocate values only for cells the symbols of which are not renamed. (ses-load): Create cells variables as the (ses-cell ...) are read, in order to check row col consistency with cell symbol name only for cells that are not renamed. (ses-replace-name-in-formula): New defun. (ses-rename-cell): New defun.
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