made non-terminal default to quiet

src/main.rs

@@ -4,6 +4,7 @@ use std::{
 		stdin,
 		stdout,
 
+		IsTerminal,
 		Write
 	},
 	process::exit
@@ -42,7 +43,7 @@ fn main() {
 	}
 
 	let mut context = util::build_context(&mut args);
-	let quiet = args.contains(flag::QUIET);
+	let quiet = args.contains(flag::QUIET) || !stdout().is_terminal();
 
 	//	collect args and evaluate if present
 	let expressions = args.finish();