jobs(bulletin): don't linkify issue refs inside inline code spans

Verifying the maintainer-inbox linkifier against a real live message surfaced a
bug: a `#N` inside an inline `code` span (e.g. `rebase #650`) was being turned
into a Markdown link, which renders as literal `[#650](…)` text inside the
backticks. linkify already skipped fenced code blocks; extend that to inline
`code` spans — hold them aside behind the same sentinels before the URL / slug /
bare passes so their contents are emitted verbatim. Adds a SUBTEST 10 (5b)
assertion that `rebase #650` in an inline span stays plain.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: kriscendobot

scripts/jobs/bulletin.sh

@@ -327,14 +327,18 @@ resolve_doer_repo() {
 # GitHub-rendered journal2 README and the gh-pages client render [label](url)):
 # full GitHub issue/PR URLs, "owner/repo#N", and — when the originating repo is
 # passed as $2 — a bare "#N" pointing at that project. Linking is skipped inside
-# fenced code blocks, and formed links are held aside so nothing is double-linked.
-# With no resolved repo ($2 empty), a bare "#N" is left as plain text.
+# fenced code blocks AND inline `code` spans, and formed links are held aside so
+# nothing is double-linked. With no resolved repo ($2 empty), a bare "#N" is left
+# as plain text.
 msg_body_quote() {
   awk -v repo="${2:-}" '
     function linkify(s,   i) {
       # Protect already-formed links and each reference kind behind SOH/STX
       # sentinels so a later pass cannot re-link inside an earlier one.
       split("", store); nstore=0
+      # 0) hold inline `code` spans verbatim so a `#N` / `owner/repo#N` inside a
+      #    code span is never linkified (a link inside backticks renders literally)
+      s = protect(s, "`[^`]*`", "code")
       # 1) full GitHub issue/PR URLs -> [url](url)
       s = protect(s, "https?://github\\.com/[A-Za-z0-9._-]+/[A-Za-z0-9._-]+/(issues|pull)/[0-9]+", "url")
       # 2) owner/repo#N -> [owner/repo#N](https://github.com/owner/repo/issues/N)
@@ -352,7 +356,9 @@ msg_body_quote() {
       out = ""
       while (match(s, re)) {
         matched = substr(s, RSTART, RLENGTH)
-        if (kind == "url") {
+        if (kind == "code") {
+          link = matched
+        } else if (kind == "url") {
           link = "[" matched "](" matched ")"
         } else if (kind == "slug") {
           hp = index(matched, "#")

scripts/jobs/test/run-test.sh

@@ -718,7 +718,7 @@ rm -rf "$BV"
 #      owner/repo#N, a full issue/PR URL, and a bare #N (to the RESOLVED repo);
 #      references inside a fenced code block stay plain. A second message from an
 #      UNRESOLVABLE doer (foreman) leaves its bare #N as plain text (no mislink).
-lmsg="$(printf 'from_host: h\nfrom: gardener:endojs-endo-but-for-bots-linktest\nreply_to: endojs-endo-but-for-bots-linktest\nsent_at: t1\n---\nOpened endojs/endo-but-for-bots#650 (CLI follow-up for #652).\nSee https://github.com/endojs/endo-but-for-bots/pull/653.\n\n```\nleave #999 and endojs/endo-but-for-bots#111 plain in a fence\n```\n')"
+lmsg="$(printf 'from_host: h\nfrom: gardener:endojs-endo-but-for-bots-linktest\nreply_to: endojs-endo-but-for-bots-linktest\nsent_at: t1\n---\nOpened endojs/endo-but-for-bots#650 (CLI follow-up for #652). Run `rebase #650` first.\nSee https://github.com/endojs/endo-but-for-bots/pull/653.\n\n```\nleave #999 and endojs/endo-but-for-bots#111 plain in a fence\n```\n')"
 push_change "inbox/maintainer/unread/bul-maint-2.md" "$lmsg" "seed maintainer message with issue refs"
 umsg="$(printf 'from_host: h\nfrom: foreman\nreply_to:\nsent_at: t2\n---\nUnresolvable doer note mentioning #4242 which must stay plain text.\n')"
 push_change "inbox/maintainer/unread/bul-maint-3.md" "$umsg" "seed unresolvable maintainer message"
@@ -732,6 +732,10 @@ rm -rf "$BV"; git clone -q --single-branch --branch "$BRANCH" "$BARE" "$BV"
 { grep -qF '> leave #999 and endojs/endo-but-for-bots#111 plain in a fence' "$BV/README.md" \
   && ! grep -qF '[#999](' "$BV/README.md"; } \
   && ok "references inside a fenced code block stay plain (not autolinked)" || bad "fenced references were autolinked"
+# references inside an inline `code` span stay plain (a link inside backticks
+# would render as literal text) — the `#650` in `rebase #650` must NOT be linked
+grep -qF '`rebase #650`' "$BV/README.md" \
+  && ok "reference inside an inline code span stays plain (not autolinked)" || bad "inline-code-span reference was autolinked"
 # unresolvable bare #N is left plain — present as text, but never turned into a link
 { grep -qF '#4242 which must stay plain text' "$BV/README.md" \
   && ! grep -qF '[#4242](' "$BV/README.md"; } \