indenting with less or greater character does not work

Turns out the current implementation requires you also have the "indent lines" plugin enabled.

I believe this plugin comes with gedit by default.

Ah, I found out that since gtksourceview can do it on its own since gedit 2.30, the plugin no longer exists.
See here: http://osdir.com/ml/gedit-list/2010-04/msg00019.html
Probably I have a more recent version so maybe its possible to use whatever exists?

hmmm, that's inconvenient......

Another thing to add to my list for when I free time again :D

seems like the snippet plugin is doing some indentation computation of its own.
I couldn't find a gtksourceview function in gedit that does the indent, it probably has the tab handling built in. Uhh...
So it might be necessary to use something like:

doc = window.get_active_document()
doc.get_insert_spaces_instead_of_tabs()
doc.get_tab_width()
doc.get_indent_width()

or copying the stuff Snippet.py is doing.

I did some work on indenting with the indent/tab_width information but I don't know if there isn't an easier way.
It only works for single lines atm, see my commit 89 and 90.
Also I made the tab key get through so it also allows indenting/other plugins. Shift-Tab needs to be in that list but modifiers need some more work.