coverage: Format all remaining tests

These tests can simply be reformatted as normal, because the resulting changes
are unimportant.

tests/coverage/coroutine.rs

@@ -9,7 +9,11 @@ use std::pin::Pin;
 // drop all `Counter` `Coverage` statements from a MIR. `simplify.rs` has logic
 // to handle this condition, and still report dead block coverage.
 fn get_u32(val: bool) -> Result<u32, String> {
-    if val { Ok(1) } else { Err(String::from("some error")) }
+    if val {
+        Ok(1)
+    } else {
+        Err(String::from("some error"))
+    }
 }
 
 fn main() {