/usr/share/tcltk/tcl8.5/Tix8.4.3/bitmaps/textfile.xbm is in tix 8.4.3-4.
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 | #define textfile_width 12
#define textfile_height 12
static unsigned char textfile_bits[] = {
0xfe, 0x01, 0x02, 0x01, 0x02, 0x07, 0x7a, 0x04, 0x02, 0x04, 0x3a, 0x04,
0x02, 0x04, 0xfa, 0x04, 0x02, 0x04, 0xfa, 0x04, 0x02, 0x04, 0xfe, 0x07};
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