[erlang-questions] 17.0 source tar.gz content change

[Kenji Rikitake]

I've noticed that otp_src_17.0.tar.gz content at erlang.org 
http://www.erlang.org/download/otp_src_17.0.tar.gz
has been changed between the version of April 9th to April 10th (and
later).

Old version (of April 9th):
MD5(otp_src_17.0.tar.gz)= f6c59175c38e878b5002516047602d65
size: 66633305 bytes

New version (of April 10th):
MD5(otp_src_17.0.tar.gz)= a5f78c1cf0eb7724de3a59babc1a28e5
size: 66640875 bytes

The diffs between the extracted directories show the difference between
the two versions is only at adding
otp_src_17.0/system/README
to the new version so this won't affect running 17.0 BEAMs,
but I'd be glad if OTP Team could explain why this happened.

Regards,
Kenji Rikitake