tidy fix done

Author: SATVIKsynopsis

tests/ui/eii/multiple-default-impls.rs

@@ -9,4 +9,4 @@ fn a() {}
 #[eii(eii1)]
 //~^ ERROR the name `eii1` is defined multiple times
 fn main() {}
-//~^ ERROR the `main` function cannot be declared in an `extern` block
+//~^ ERROR the `main` function cannot be declared in an `extern` block