Update xtask/src/hooks.rs

Co-authored-by: Emil Gardström <emil.gardstrom@gmail.com>

Author: Alexhuszagh

xtask/src/hooks.rs

@@ -234,14 +234,9 @@ pub fn test(
     if python {
         tests.push("python");
     }
-    let join_to = tests.len() - 1;
-    let mut joined = tests[0..join_to].join(", ");
-    if join_to > 1 {
-        joined.push(',');
-    }
     msg_info.info(format_args!(
-        "Running {joined} and {} tests.",
-        tests[join_to]
+        "Running {} tests.",
+        tests.join(',')
     ))?;
 
     let channel = get_channel_prefer_nightly(msg_info, toolchain)?;