A couple of bug fixes

@HowardHinnant @nbougalis 
Each continuation is indented an additional tab stop from the previous line. Other examples:
https://github.com/ripple/rippled/blob/develop/src/ripple/overlay/impl/PeerImp.cpp#L434
https://github.com/ripple/rippled/blob/develop/src/ripple/overlay/impl/PeerImp.cpp#L741
This is the style used by parts of boost:
https://github.com/boostorg/asio/blob/master/include/boost/asio/impl/connect.hpp#L338