REVIEWING.md's 15 copies lag the shared part's third case, shapes built to break it #2004

The shared part of REVIEWING.md in btclib-org/.github is changing: What a diff decides with is run, not read gains a third case to run, the shapes built to break it, and its paragraph "One case is the reviewer's to build" becomes "Rows excusing a failure are tried too". Once that lands, the copies in the other 15 repositories carry the old text, and tests/verbatim_test.py holds REVIEWING.md in EXPECTED_DRIFT against this issue.

The copies are brought in line in one campaign. Each tree's own part, under This repository in particular, is left as it is.

Done when

• Each of the 15 repositories' REVIEWING.md agrees with btclib-org/.github's up to This repository in particular.
• The REVIEWING.md entry is gone from EXPECTED_DRIFT.