docs: M5d-2: after gate: ok, do not sum test results

Task 01 told Ornith to add up every `test result:` N passed. A greedy
sed kept the last digit (1512 became 1022) and it stopped with the
correct T1 and given test uncommitted. T50/T59: the last line of
make gate is the count; summing is not a stop.

Co-Authored-By: Grok 4.6 <noreply@x.ai>

docs/plans/M5d2/09-memoryd-summary-index.md

@@ -117,7 +117,8 @@ results are indexed. A comment that does not fit its code: stop.
   test passes, 5 in `tool_summary_index`.
 - [ ] **5. Check.** `git diff --stat` lists exactly `crates/memoryd/src/index.rs`.
 - [ ] **6. Run the gate.** `cargo fmt --all`, then `make gate`, timeout 600000 ms. Last line
-  `gate: ok`. Test count **1568** (1563 before, plus 5).
+  `gate: ok`. Test count **1568** (1563 before, plus 5). After `gate: ok`, do not add up
+  `test result:` lines.
 - [ ] **7. Log and commit.** Task cell `M5d2/09-memoryd-summary-index`. Stage with
   `git add crates/memoryd docs/implementer-log.md Cargo.lock`, then commit as `AGENTS.md`
   says.
@@ -131,7 +132,7 @@ results are indexed. A comment that does not fit its code: stop.
 ## Stop and report if
 
 - The branch check fails; a "before" block is not found exactly once; step 2 differs; `cargo
-  check` warns; a test fails; the gate count is not 1568; you index `ToolResult` content; you
+  check` warns; a test fails; the gate's last line is not `gate: ok`; you index `ToolResult` content; you
   leave `kind` as `"session"`; a secret summary is searchable on a private index.
 
 ## What the given tests pin