When git-bash is the active shell but PowerShell is also detected on Windows, the system prompt now reads: Shell: PowerShell (use PowerShell syntax — e.g., $null not /dev/null, $env:VAR not $VAR, backtick for line continuation). Bash is also available via the Bash tool for POSIX scripts.
Previously the wording was bash-first with a "PowerShell is also available via the PowerShell tool" suffix; the new copy emphasizes PowerShell as primary and points at Bash as a fallback.
Evidence
Windows shell description (search for "Bash is also available via the Bash tool for POSIX scripts").
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
