Cannot insert tab in vim keybinding

[quickdudley]

To replicate: open yi with the vim keybinding; press 'a' or 'i' to enter insert mode; and press the tab key
Expected results: there should be a tab character in the buffer
Actual results: four spaces are inserted instead.

[noughtmare]

I think 4 spaces instead of tab is actually a sane default, but I think a configuration option should indeed be added (if there isn't one yet).

[noughtmare]

Found it: https://hackage.haskell.org/package/yi-core-0.17.1/docs/Yi-Buffer-Misc.html#t:IndentSettings. Seems like it can only be changed in the mode settings (https://hackage.haskell.org/package/yi-core-0.17.1/docs/Yi-Buffer-Misc.html#t:Mode), #1069 tracks that issue.

[quickdudley]

expandTabs = False does enable the insertion of tabs but unfortunately breaks auto-indentation in files which are space-indented.