Docs: a normal PTY read completes when the shell exits #284

What

A normal-PTY read completes normally when the shell exits; undocumented

Severity: nit. Seen by the builders of apps: 05.

Upstream (pinned v2.0.29)

The server sends close 1000 and status exited; a later connect gets 4404

Proposed

Document that a normal-PTY read completes normally when the shell exits, matching upstream (close 1000, status exited; a later connect gets 4404).

Source: internal DevEx evaluation of 0.9.0-preview.10 on Windows, Linux and macOS, 2026-10-14 (finding DX-10).