fix catflap example for windows

examples/catflap.rs

@@ -1,5 +1,3 @@
-const CHANGE_THIS_TEXT: &str = "hello world!";
-
 #[cfg(unix)]
 #[async_std::main]
 async fn main() -> Result<(), std::io::Error> {
@@ -8,10 +6,19 @@ async fn main() -> Result<(), std::io::Error> {
     let mut app = tide::new();
     app.at("/").get(|_| async { Ok(CHANGE_THIS_TEXT) });
 
+    const CHANGE_THIS_TEXT: &str = "hello world!";
+
+    const DOCS: &str = "
+To run this example:
+$ cargo install catflap cargo-watch
+$ catflap -- cargo watch -x \"run --example catflap\"
+
+and then edit this file";
+
     if let Some(fd) = env::var("LISTEN_FD").ok().and_then(|fd| fd.parse().ok()) {
         app.listen(unsafe { TcpListener::from_raw_fd(fd) }).await?;
     } else {
-        println!("{} {}", DOCS, file!());
+        println!("{} ({})", DOCS, file!());
     }
     Ok(())
 }
@@ -20,10 +27,3 @@ async fn main() -> Result<(), std::io::Error> {
 fn main() {
     panic!("this example only runs on cfg(unix) systems");
 }
-
-const DOCS: &str = "to run this example:
-$ cargo install catflap cargo-watch
-$ catflap -- cargo watch -x \"run --example catflap\"
-
-and then edit
-";