doc: /* Non-nil means don't call fsync in `write-region'.
This variable affects calls to `write-region' as well as save commands.
Setting this to nil may avoid data loss if the system loses power or
-the operating system crashes. */);
+the operating system crashes. By default, it is non-nil in batch mode. */);
write_region_inhibit_fsync = 0; /* See also `init_fileio' above. */
DEFVAR_BOOL ("delete-by-moving-to-trash", delete_by_moving_to_trash,