[partaevil]

Strict Clippy rejects two existing test expressions on the pinned base: TAU as Real
casts f32 to f32 in the rapier2d soft-recovery integration fixture, and -1.0 as Real
is a redundant literal cast in the shared dim2 soft-contact unit test.

Remove the first cast and give the second tuple an explicit (u32, u32, Real) type.
The values and assertions remain the same; both edits are in tests and no non-test source
changes.

The failures were reproduced against the original upstream file hashes. With these
corrections, strict library/test Clippy passes for all four native dimension/precision
crates in default and parallel configurations. Complete isolated library/integration
matrices pass (723 default / 737 parallel tests). Those matrices also contained separate
origin, documentation and parallel-fixture patches; none is included in this PR.

cargo clippy -p rapier2d -p rapier3d -p rapier2d-f64 -p rapier3d-f64 --lib --tests -- -D warnings
cargo clippy -p rapier2d -p rapier3d -p rapier2d-f64 -p rapier3d-f64 --lib --tests --features parallel -- -D warnings