delete-selection-modedelete-selection-mode is a variable defined in `
delsel.el'. Its value is
nilDocumentation: Non-nil if Delete-Selection mode is enabled. See the command `delete-selection-mode' for a description of this minor mode. Setting this variable directly does not take effect; either customize it (see the info node `Easy Customization') or call the function `delete-selection-mode'. You can customize this variable.