correct terminology for floats

Author: LorrensP-2158466

src/tools/miri/tests/pass/float.rs

@@ -1153,18 +1153,18 @@ pub fn libm() {
     assert_approx_eq!((-2.0f64).asinh(), -1.443635475178810342493276740273105f64);
 
     // Ensure `sin` always returns something that is a valid input for `asin`, and same for
-    // `cos` and `acos`
-    let halve_pi_single = std::f32::consts::FRAC_PI_2;
-    let halve_pi_double = std::f64::consts::FRAC_PI_2;
-    let pi_single = std::f32::consts::PI;
-    let pi_double = std::f64::consts::PI;
+    // `cos` and `acos`.
+    let halve_pi_f32 = std::f32::consts::FRAC_PI_2;
+    let halve_pi_f64 = std::f64::consts::FRAC_PI_2;
+    let pi_f32 = std::f32::consts::PI;
+    let pi_f64 = std::f64::consts::PI;
     for _ in 0..64 {
         // sin() should be clamped to [-1, 1] so asin() can never return NaN
-        assert!(!halve_pi_single.sin().asin().is_nan());
-        assert!(!halve_pi_double.sin().asin().is_nan());
+        assert!(!halve_pi_f32.sin().asin().is_nan());
+        assert!(!halve_pi_f64.sin().asin().is_nan());
         // cos() should be clamped to [-1, 1] so acos() can never return NaN
-        assert!(!pi_single.cos().acos().is_nan());
-        assert!(!pi_double.cos().acos().is_nan());
+        assert!(!pi_f32.cos().acos().is_nan());
+        assert!(!pi_f64.cos().acos().is_nan());
     }
 
     assert_eq!(0f32.cos(), 1f32);