f clearer var name

Author: TheBlueMatt

lightning/src/offers/invoice_request.rs

@@ -3017,23 +3017,23 @@ mod tests {
 		// ❤      variation-selector
 		// e29da4 efb88f
 		let s = String::from("❤️");
-		for idx in 0..(s.len() + 5) {
-			if idx >= s.len() {
-				assert_eq!(s, string_truncate_safe(s.clone(), idx));
-			} else if (3..s.len()).contains(&idx) {
-				assert_eq!("❤", string_truncate_safe(s.clone(), idx));
+		for new_len in 0..(s.len() + 5) {
+			if new_len >= s.len() {
+				assert_eq!(s, string_truncate_safe(s.clone(), new_len));
+			} else if (3..s.len()).contains(&new_len) {
+				assert_eq!("❤", string_truncate_safe(s.clone(), new_len));
 			} else {
-				assert_eq!("", string_truncate_safe(s.clone(), idx));
+				assert_eq!("", string_truncate_safe(s.clone(), new_len));
 			}
 		}
 
 		// Every byte in an ASCII string is also a full UTF-8 code point.
 		let s = String::from("my ASCII string!");
-		for idx in 0..(s.len() + 5) {
-			if idx >= s.len() {
-				assert_eq!(s, string_truncate_safe(s.clone(), idx));
+		for new_len in 0..(s.len() + 5) {
+			if new_len >= s.len() {
+				assert_eq!(s, string_truncate_safe(s.clone(), new_len));
 			} else {
-				assert_eq!(s[..idx], string_truncate_safe(s.clone(), idx));
+				assert_eq!(s[..new_len], string_truncate_safe(s.clone(), new_len));
 			}
 		}
 	}