PVS-Studio warning V576 for TortoiseGIT

int CGit::GetCommitDiffList(....)
{
  ....
  cmd.Format(
    _T("git.exe diff -r -R --raw -C -M --numstat -z %s --"),
    ignore, rev1);
  ....
}

This suspicious code was found in TortoiseGIT project by PVS-Studio static code analyzer.
Warning message is:
V576 Incorrect format. A different number of actual arguments is expected while calling 'Format' function. Expected: 2. Present: 3. git.cpp 1231

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