rtx-cfd: rustfmt over the repaired GPU modules and tests

crates/specialized/rtx-cfd/src/turbulence/smagorinsky_gpu.rs

@@ -80,7 +80,11 @@ impl SmagorinskyGpuModel {
     /// Load and compile Smagorinsky CUDA kernels
     fn load_smagorinsky_kernels(&mut self) -> CfdResult<()> {
         // In real implementation, would compile or load PTX for Smagorinsky kernels
-        self.smagorinsky_module = Some(self.kernel_manager.get_module("smagorinsky_kernels")?.clone());
+        self.smagorinsky_module = Some(
+            self.kernel_manager
+                .get_module("smagorinsky_kernels")?
+                .clone(),
+        );
         Ok(())
     }
 
@@ -242,7 +246,10 @@ impl SmagorinskyGpuModel {
                     .arg(&(buffers.nz as i32))
                     .launch(config)
                     .map_err(|e| {
-                        CfdError::gpu_error(&format!("Velocity gradients kernel launch failed: {}", e))
+                        CfdError::gpu_error(&format!(
+                            "Velocity gradients kernel launch failed: {}",
+                            e
+                        ))
                     })?;
             }
         }