Bound note header parsing

scripts/review-note

@@ -62,9 +62,9 @@ cmd_latest() {
   local blob obj note br rnd best="" best_round=-1
   while read -r blob obj; do
     note=$(git notes --ref="$NOTES_REF" show "$obj") || continue
-    br=$(sed -n 's/^branch: //p' <<<"$note")
+    br=$(sed -n '/^$/q; s/^branch: //p' <<<"$note")
     [ "$br" = "$branch" ] || continue
-    rnd=$(sed -n 's/^round: //p' <<<"$note")
+    rnd=$(sed -n '/^$/q; s/^round: //p' <<<"$note")
     [[ "$rnd" =~ ^[0-9]+$ ]] || continue
     if [ "$rnd" -gt "$best_round" ]; then
       best_round=$rnd

scripts/review-note-test

@@ -49,6 +49,7 @@ if "$rn" write "$note" >/dev/null 2>&1; then fail "write should refuse an existi
 sed 's/^verdict: request-changes/verdict: approve/' "$note" > "$tmp/note1b"
 "$rn" write "$tmp/note1b" --force
 "$rn" show | grep -q '^verdict: approve$' || fail "show should print the replaced note"
+"$rn" show | diff -u "$tmp/note1b" - || fail "show should print the note verbatim"
 
 # latest finds the note by branch, even from a newer unreviewed tip
 echo three > c.txt && git add c.txt && git commit -qm three