cat(1): fixed pseudo-unbuffered output

src/cat.rs

@@ -53,11 +53,7 @@ fn main() -> ExitCode {
     if path == "-" {
       loop {
         match io::stdin().lock().read_line(&mut output) {
-          Ok(EOF) => {
-            print!("{}", output);
-            output.clear();
-            if EOF == 0 { break }
-          },
+          Ok(EOF) => if EOF == 0 { break },
           Err(_) => {
             eprintln!("Usage: {} [options...] [files...]", &argv0);
             return ExitCode::Usage;
@@ -66,13 +62,15 @@ fn main() -> ExitCode {
       }
     } else {
       match read_to_string(&path) {
-        Ok(output) => print!("{}", output),
+        Ok(output) => {},
         Err(_) => {
           eprintln!("{}: {}: No such file or directory.", &argv0, &path);
           return ExitCode::NoInput;
         },
       };
     }
+    print!("{}", output);
+    output.clear();
   }
   match io::stdout().flush() {
     Ok(_) => return ExitCode::Ok,