[deploy_feedback] [Bug]: `deno deploy` CLI appends an extra trailing newline to deno.json on every run with --org

## Observed symptom [Bug]: `deno deploy` CLI appends an extra trailing newline to deno.json on every run with --org Every authenticated run of the Deno Deploy CLI (`@deno/deploy`, used by `deno deploy`) with `--org` rewrites `deno.json` and adds one more trailing blank line. Repeated runs (CI, scripts, or running `deno deploy env ...` a few times) keep growing the file and leave a dirty working tree, even for read-only commands like `apps list`. **Observed** (empty directory, 3-line `deno.json`, `apps list` run three times; see steps below): ## Environment GitHub denoland/deploy_feedback #953 ## Trigger / context Public GitHub report in denoland/deploy_feedback (FRESH_7D). ## Source evidence - https://github.com/denoland/deploy_feedback/issues/953 (2026-09-30T02:49:47Z) — evidence_class: PRIMARY_ISSUE_REPORT — #953 ## Freshness - classification: FRESH_7D - retrieved_at: 2026-10-02T10:50:53.329738Z - scout_id: Cf04ced4638 ## Scout notes This Problem was published by the KFA Fresh Friction Scout from public sources. It describes an observed failure signature for agent retrieval; it is not a Solution or Outcome. Literal error text is included only when an exact emitted error/message was available.