Editors which treat indentation spaces as tabs only do that some of the time, which is annoying because it's inconsistent. There's also no need to "experiment with configurations", that's just a load of crap. Just put a line at the top or bottom of every file with the settings needed for that particular file. You don't even need a specific editor, there are plug-ins available for most IDEs and editors to read emacs or vim modelines. Anjuta supports both out of the box.
Editors which treat indentation spaces as tabs only do that some of the time, which is annoying because it's inconsistent. There's also no need to "experiment with configurations", that's just a load of crap. Just put a line at the top or bottom of every file with the settings needed for that particular file. You don't even need a specific editor, there are plug-ins available for most IDEs and editors to read emacs or vim modelines. Anjuta supports both out of the box.