PowerShell hook: engine history keeps the wrapped line in an interactive session #51

In an interactive PowerShell session with the capture hook, the engine history (Get-History, history, r) keeps the wrapped form of every captured line, for example . __cdg { git status }, instead of the line as typed. #48 was meant to put the typed line back before the next prompt, and its unit test passes.

Cause: __cdg is dot-sourced, and at the prompt that means into the global scope. Its local $__cdgLine = $global:__cdgLine is therefore the global variable itself, and the cleanup in its finally (Remove-Variable ... __cdgLine ...) deletes it. __cdgRestoreHistory then finds no line and returns without restoring. The unit test calls __cdgRestoreHistory directly, without __cdg, so it does not see this.

To reproduce: start pwsh -NoProfile, dot-source src/codigest/shell/hook.ps1 with cdg on PATH, run echo a, then echo b, then (Get-History).CommandLine. It lists . __cdg { echo a } and . __cdg { echo b }.

Fix: give the local in __cdg a name of its own.