Hi! You have to edit /usr/lib/gedit/plugins/externaltools/functions.py", line 225 and replace
Gedit.commands.save_document(window, doc) to Gedit.commands_save_document(window, doc) -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org