Fix dbg macro

Author: Aaron1011

library/std/src/macros.rs

@@ -289,7 +289,7 @@ macro_rules! dbg {
     // `$val` expression could be a block (`{ .. }`), in which case the `eprintln!`
     // will be malformed.
     () => {
-        $crate::eprintln!("[{}:{}]", $crate::file!(), $crate::line!());
+        $crate::eprintln!("[{}:{}]", $crate::file!(), $crate::line!())
     };
     ($val:expr $(,)?) => {
         // Use of `match` here is intentional because it affects the lifetimes