tools: dist export no longer cuts the dist export record out of the shipped tools/CONTRACT.md (#121)

Files changed:
- CHANGES.md
- VERSION
- tools/CONTRACT.md
- tools/chemenu/commands/dist_cmd.py
- tools/chemenu/tests/test_docs_verify.py

tools/chemenu/tests/test_docs_verify.py

@@ -107,6 +107,18 @@ def test_the_real_commands_region_is_current():
     assert docs_verify.check_commands_region() == []
 
 
+def test_the_commands_region_survives_dist_export_unchanged():
+    """`dist export` removes `dist:strip` marker spans from shipped files, so a
+    record whose prose quotes the literal marker pair gets cut in the
+    exported `tools/CONTRACT.md` - and the fresh instance's own `docs verify`
+    then reports its generated region stale. That is what failed CI's
+    fresh-instance step the first time this region shipped; this pins it
+    without needing the full replay."""
+    plan = dist_cmd.build_plan()
+    shipped = plan["tools/CONTRACT.md"].content
+    assert shipped == (config.ROOT / "tools" / "CONTRACT.md").read_text(encoding="utf-8")
+
+
 def test_every_registered_commands_flags_are_documented():
     """Forward direction against the real tree and the real Click app: every
     non-hidden flag of every command must appear in its cli_contract