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By default, some data is prepended with an apostrophe character if it begins with an =, +, or @, to help prevent issues with people sending formulas that then trigger when you view the spreadsheet, which could be harmful. This is false in cases where the setting is prepending with an = so it doesn't cause issues when you set something like =SUM([123], [124]).
Usage
add_filter( 'frm_googlespreadsheet_escape_value', '__return_true' );.
Parameters
- None