/usr/share/tcltk/tcl8.6/Tix8.4.3/bitmaps/minimize.xbm is in tix 8.4.3-10.
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 minimize_width 15
#define minimize_height 15
static unsigned char minimize_bits[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe0, 0x01,
0x20, 0x03, 0x20, 0x03, 0xe0, 0x03, 0xc0, 0x03, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
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