Why cygwin's history output is prefixed by two spaces?

[Sophoklis Goumas]

This comes from a cygwin installation:

~$ cygcheck -V | head -n1
cygcheck (cygwin) 3.5.3
~$ printf "%s\n" "$( bash --version | head -n1 )"
GNU bash, version 5.2.21(1)-release (x86_64-pc-cygwin)
~$ history | tail -n1 | od -a
0000000  sp  sp  sp   4   3  sp  sp   h   i   s   t   o   r   y  sp   |
0000020  sp   t   a   i   l  sp   -   n   1  sp   |  sp   o   d  sp   -
0000040   a  nl
0000042

And this is what I've compared it against:

$ printf "%s\n" "$( bash --version | head -n1 )"
GNU bash, version 5.2.15(1)-release (x86_64-pc-linux-gnu)
$ history | tail -n1 | od -a
0000000  sp   7   3   5   1  sp  sp   h   i   s   t   o   r   y  sp   |
0000020  sp   t   a   i   l  sp   -   n   1  sp   |  sp   o   d  sp   -
0000040   a  nl
0000042

Hypotheses/ideas/insights/explanations/conclusions?

Sophoklis