Practical source is taken verbatim (UTF-8 and LF normalization only) from
https://github.com/mcc-exam/src.git
commit a44c65dee9eadf37310a54bcbc90fe78df2289f3.

The upstream snapshot contains no license file. The project owner confirmed
ownership and selected all rights reserved, local use only on 2026-10-07.
The LICENSE in this distribution records that local-use restriction for both
the extension and bundled practicals. No practical code is executed by px-idle.
The owner subsequently authorized PyPI publication; recipients' redistribution
rights remain reserved.
