/usr/share/racket/pkgs/icons/up-down-mask.xbm is in racket-common 6.7-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | #define up_down_mask_xbm_width 16
#define up_down_mask_xbm_height 16
static char up_down_mask_xbm_bits[] = {
0x00, 0x01, 0x80, 0x03, 0xC0, 0x07, 0xE0, 0x0F, 0xE0, 0x0F, 0x80, 0x03,
0xFE, 0xFF, 0xFE, 0xFF, 0xFE, 0xFF, 0xFE, 0xFF, 0x80, 0x03, 0xE0, 0x0F,
0xE0, 0x0F, 0xC0, 0x07, 0x80, 0x03, 0x00, 0x01 };
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