Fix assert! macro usage

There is a bug in rustc that allows adding invalid trailing tokens to
the `assert!` macro call. They are currently ignored but are going to
produce errors in the future.

Fix assert! macro usage to remove extra tokens.

For more information, see
rust-lang/rust#60024 and
rust-lang/rust#60039

Author: rasendubi

src/generators/phrase.rs

@@ -196,7 +196,7 @@ mod test {
             passwords
                 .words
                 .into_iter()
-                .all(|word| word.len() >= 5);
+                .all(|word| word.len() >= 5)
         )
     }