Which text editors for iPhone support tabs and editing files in Dropbox in-place?
GoCoEdit

GoCoEdit is a Code and Text Editor optimized for fast opening and editing local (on iOS device) and remote (on server) files with your iOS Device.

It supports extended syntax highlighting on many coding languages and has a themable interface with many dark and light themes.

Features:


  
  Universal App (use it on your iPad, iPhone &amp; iPod Touch)
  Connect to your servers via SFTP, FTP, Google Drive, Dropbox or OneDrive
  Multiple Tabs
  Very fast reconnect and recover of open files after restart
  Upload and Download files/folders or edit files directly on your server/dropbox/drive without download
  Supporting iOS9 features like textselection by cursor, Splitview and Slide-Over
  Supporting 3D Touch
  External/Bluetooth keyboard support, with lots of shortcuts