The synced identity text carries em-dashes, but install.ps1 must stay
pure ASCII (Windows PowerShell 5.1 reads BOM-less .ps1 in the ANSI code
page; a non-ASCII byte in a string literal desyncs the parser — see
tests/test_install_ps1_ascii_only.py, issues #66994/#67000). Seed the
ASCII-dashed variant there instead, and register that variant in
_LEGACY_TEMPLATE_SOULS so Windows installs converge onto the canonical
em-dash text on first run.
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