### `wai conform` runs a command line on Windows as it is written

On Windows, `--impl`'s command line went to `cmd` with its quotes escaped, so a placeholder's quoted
path reached the implementation with the quotes as part of the path, and every case of a command
adapter failed ("no verdict"). `cmd` now gets the line as it is written, a quoted program first
included. A test on Windows holds both forms, and `wai conform --key <name>` ran there against the
JWP corpus.
