test(drafter): pin the rest of #2990's verify list to the span scan (#4222)

#2990 asked for three cases. The wrapped-comment-continuation one shipped
with #4222; these are the other two — a comment holding a whole rule defines
nothing, and an unterminated comment does not swallow the file. Both already
pass on both sides; the vectors are what stops a later change to the scan
quietly taking them back.

The phantom #2990 was filed for is among the twenty-two #4222 removes:
`.editor-body` in TaskEditorView.vue, a persisted `code_shapes` row whose
signature ends in `*/` and whose `used_by` count is zero — so it has been
sitting in the unused_css number the operator is meant to act on.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01821k5B3Ysecp9fNYs92Kuy

tests/test_pattern_coverage.py

@@ -89,6 +89,18 @@ EXTRACTION_VECTORS = [
      "/* A real base rule, not just descendants: the check reads a\n"
      "   .ghost, class that only ever appears as an ancestor */\n.check { }\n",
      [("css", "check")]),
+    # The rest of #2990's verify list, which this scan satisfies as written:
+    # a comment holding a WHOLE rule defines nothing, and an unterminated
+    # comment does not swallow the file. The phantom it was filed for —
+    # `.editor-body` out of a wrapped comment in TaskEditorView.vue, a
+    # persisted row with a `used_by` count of zero inflating unused_css — is
+    # among the twenty-two this removes.
+    ("comment-containing-a-whole-rule",
+     "/* .ghost {\n     color: red;\n   } */\n.real { color: blue; }\n",
+     [("css", "real")]),
+    ("unterminated-block-comment",
+     "/* never closed\n.after { color: red; }\n",
+     [("css", "after")]),
     # A string that HOLDS a comment marker is not a comment — the case that
     # made the first draft of the scan eat 70 lines of live code.
     ("string-holds-a-marker",