use const in test file

Author: chenyukang

tests/ui/numbers-arithmetic/issue-109567.rs

@@ -1,16 +1,14 @@
 // run-pass
 // check-run-results
 
-pub fn f() -> f64 {
+fn f() -> f64 {
     std::hint::black_box(-1.0) % std::hint::black_box(-1.0)
 }
 
-pub fn g() -> f64 {
-    -1.0 % -1.0
-}
+const G: f64 = -1.0 % -1.0;
 
 pub fn main() {
-    assert_eq!(-1, g().signum() as i32);
-    assert_eq!((-0.0_f64).to_bits(), f().to_bits());
-    assert_eq!(f().signum(), g().signum());
+    assert_eq!(-1, G.signum() as i32);
+    assert_eq!((-0.0_f64).to_bits(), G.to_bits());
+    assert_eq!(f().signum(), G.signum());
 }