simplify option_vec_printer

src/misc.rs

@@ -248,7 +248,8 @@ where
 	T: Clone,
 {
 	let max_i: i32 = (data.len() as i32) - 1;
-	let output: String = data
+	"[".to_owned()
+		+ &data
 			.iter()
 			.enumerate()
 			.map(|(i, x)| {
@@ -264,9 +265,8 @@ where
 				tmp
 			})
 			.collect::<Vec<String>>()
-		.concat();
-
-	format!("[{}]", output)
+			.concat()
+		+ "]"
 }
 // Returns a vector of length `max_i` starting at value `min_x` with resolution
 // of `resolution`