Tweak various coverage test files for slightly nicer formatting

For coverage tests, splitting code across multiple lines often makes the
resulting coverage report easier to interpret, so we force rustfmt to retain
line breaks by adding dummy line comments with `//`.

Author: Zalathar

tests/coverage/auxiliary/used_crate.rs

@@ -17,23 +17,23 @@ pub fn used_function() {
 }
 
 pub fn used_only_from_bin_crate_generic_function<T: Debug>(arg: T) {
-    println!("used_only_from_bin_crate_generic_function with {:?}", arg);
+    println!("used_only_from_bin_crate_generic_function with {arg:?}");
 }
 // Expect for above function: `Unexecuted instantiation` (see below)
 pub fn used_only_from_this_lib_crate_generic_function<T: Debug>(arg: T) {
-    println!("used_only_from_this_lib_crate_generic_function with {:?}", arg);
+    println!("used_only_from_this_lib_crate_generic_function with {arg:?}");
 }
 
 pub fn used_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
-    println!("used_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+    println!("used_from_bin_crate_and_lib_crate_generic_function with {arg:?}");
 }
 
 pub fn used_with_same_type_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
-    println!("used_with_same_type_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+    println!("used_with_same_type_from_bin_crate_and_lib_crate_generic_function with {arg:?}");
 }
 
 pub fn unused_generic_function<T: Debug>(arg: T) {
-    println!("unused_generic_function with {:?}", arg);
+    println!("unused_generic_function with {arg:?}");
 }
 
 pub fn unused_function() {

tests/coverage/auxiliary/used_inline_crate.rs

@@ -31,28 +31,28 @@ pub fn used_inline_function() {
 
 #[inline(always)]
 pub fn used_only_from_bin_crate_generic_function<T: Debug>(arg: T) {
-    println!("used_only_from_bin_crate_generic_function with {:?}", arg);
+    println!("used_only_from_bin_crate_generic_function with {arg:?}");
 }
 // Expect for above function: `Unexecuted instantiation` (see notes in `used_crate.rs`)
 
 #[inline(always)]
 pub fn used_only_from_this_lib_crate_generic_function<T: Debug>(arg: T) {
-    println!("used_only_from_this_lib_crate_generic_function with {:?}", arg);
+    println!("used_only_from_this_lib_crate_generic_function with {arg:?}");
 }
 
 #[inline(always)]
 pub fn used_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
-    println!("used_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+    println!("used_from_bin_crate_and_lib_crate_generic_function with {arg:?}");
 }
 
 #[inline(always)]
 pub fn used_with_same_type_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
-    println!("used_with_same_type_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+    println!("used_with_same_type_from_bin_crate_and_lib_crate_generic_function with {arg:?}");
 }
 
 #[inline(always)]
 pub fn unused_generic_function<T: Debug>(arg: T) {
-    println!("unused_generic_function with {:?}", arg);
+    println!("unused_generic_function with {arg:?}");
 }
 
 #[inline(always)]

tests/coverage/coroutine.coverage

@@ -10,9 +10,9 @@
    LL|       |// to handle this condition, and still report dead block coverage.
    LL|      1|fn get_u32(val: bool) -> Result<u32, String> {
    LL|      1|    if val {
-   LL|      1|        Ok(1)
+   LL|      1|        Ok(1) //
    LL|       |    } else {
-   LL|      0|        Err(String::from("some error"))
+   LL|      0|        Err(String::from("some error")) //
    LL|       |    }
    LL|      1|}
    LL|       |

tests/coverage/coroutine.rs

@@ -10,9 +10,9 @@ use std::pin::Pin;
 // to handle this condition, and still report dead block coverage.
 fn get_u32(val: bool) -> Result<u32, String> {
     if val {
-        Ok(1)
+        Ok(1) //
     } else {
-        Err(String::from("some error"))
+        Err(String::from("some error")) //
     }
 }
 

tests/coverage/inline-dead.coverage

@@ -14,7 +14,7 @@
    LL|       |#[inline]
    LL|      1|fn live<const B: bool>() -> u32 {
    LL|      1|    if B {
-   LL|      0|        dead()
+   LL|      0|        dead() //
    LL|       |    } else {
    LL|      1|        0
    LL|       |    }

tests/coverage/inline-dead.rs

@@ -13,7 +13,7 @@ fn main() {
 #[inline]
 fn live<const B: bool>() -> u32 {
     if B {
-        dead()
+        dead() //
     } else {
         0
     }

tests/coverage/inner_items.coverage

@@ -52,7 +52,7 @@
                    ^0
    LL|       |
    LL|      1|    let mut val = InStruct {
-   LL|      1|        in_struct_field: 101,
+   LL|      1|        in_struct_field: 101, //
    LL|      1|    };
    LL|      1|
    LL|      1|    val.default_trait_func();

tests/coverage/inner_items.rs

@@ -50,7 +50,7 @@ fn main() {
     }
 
     let mut val = InStruct {
-        in_struct_field: 101,
+        in_struct_field: 101, //
     };
 
     val.default_trait_func();

tests/coverage/partial_eq.coverage

@@ -26,7 +26,7 @@
    LL|      1|        "{:?} < {:?} = {}",
    LL|      1|        version_3_2_1,
    LL|      1|        version_3_3_0,
-   LL|      1|        version_3_2_1 < version_3_3_0
+   LL|      1|        version_3_2_1 < version_3_3_0, //
    LL|      1|    );
    LL|      1|}
    LL|       |

tests/coverage/partial_eq.rs

@@ -26,7 +26,7 @@ fn main() {
         "{:?} < {:?} = {}",
         version_3_2_1,
         version_3_3_0,
-        version_3_2_1 < version_3_3_0
+        version_3_2_1 < version_3_3_0, //
     );
 }