f - Clarify cache entry removal comment

Author: jkczyz

lightning-invoice/src/payment.rs

@@ -280,7 +280,8 @@ where
 						log_trace!(self.logger, "Payment {} rejected by destination; not retrying (attempts: {})", log_bytes!(payment_hash.0), attempts);
 					}
 
-					// Either the payment was rejected, exceeded the maximum attempts, or failed.
+					// Either the payment was rejected, the maximum attempts were exceeded, or an
+					// error occurred when attempting to retry.
 					entry.remove();
 				} else {
 					log_trace!(self.logger, "Unknown payment {}; cannot retry)", log_bytes!(payment_hash.0));