Added comment about remainder bits in QR symbol in all language versions.

java/io/nayuki/qrcodegen/QrCode.java

@@ -514,6 +514,8 @@ public final class QrCode {
 						modules[y][x] = ((data[i >>> 3] >>> (7 - (i & 7))) & 1) != 0;
 						i++;
 					}
+					// If there are any remainder bits (0 to 7), they are already
+					// set to 0/false/white when the grid of modules was initialized
 				}
 			}
 		}