850a2e966a
- Drop loaded_python3_provider + python3_host_prog: the guard variable was wrong (1 doesn't disable, 0 does) and the venv path doesn't survive a fresh clone. Let nvim find system python instead. - Add "black" to Mason ensure_installed; conform already uses it for Python but it wasn't being auto-installed. - Delete lua/custom/configs/rust-tools.lua: leftover from before rustaceanvim migration, never required anywhere.
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