Incorrect documentation for sync

[moreindirection]

In README.rst, the Synchronization section has this code sample:

sync = sync.next(client) # equivalent to client.sync(sync_token=sync.next_sync_token)

The example code given in the comment doesn't work. It needs to be:

client.sync({'sync_token': sync.next_sync_token})

[mark-mishyn]

Thanks @moreindirection!

Very helpful information for me:)