cleanup buf.append(s.substring(a, b)) -> buf.append(s, a, b)

apps/addressbook/java/src/net/i2p/addressbook/Daemon.java

...e/java/src/net/i2p/router/web/helpers/FileDumpHelper.java

...le/java/src/net/i2p/router/web/helpers/NetDbRenderer.java

...le/java/src/net/i2p/router/web/helpers/SummaryHelper.java

...g/java/src/net/i2p/client/streaming/impl/PacketLocal.java

...usimail/src/src/i2p/susi/webmail/encoding/HeaderLine.java

core/java/src/net/i2p/client/impl/I2PSessionImpl.java

core/java/src/net/i2p/util/Addresses.java

router/java/src/net/i2p/router/peermanager/PeerTestJob.java

.../java/src/net/i2p/router/transport/udp/PacketBuilder.java

router/java/src/net/i2p/router/transport/udp/PeerState.java

.../java/src/net/i2p/router/transport/udp/PeerTestState.java

router/java/src/net/i2p/router/tunnel/FragmentedMessage.java

router/java/src/net/i2p/router/tunnel/HopConfig.java

...r/java/src/net/i2p/router/tunnel/TunnelCreatorConfig.java

router/java/src/net/i2p/router/tunnel/pool/TunnelPool.java