stris(1): fix silly mistakes

src/stris.rs

@@ -19,7 +19,7 @@
 
 use std::{
 	env::args,
-	process::ExitCode
+	process::ExitCode,
 };
 
 extern crate getopt;
@@ -30,7 +30,7 @@ use sysexits::EX_USAGE;
 
 struct Reqs {
 	ascii: bool, blank: bool, cntrl: bool, digit: bool, lower: bool,
-	upper: bool, inuse: bool, extra: String::default()
+	upper: bool, inuse: bool, extra: String
 }
 
 fn usage(s: &str) -> ExitCode {