TODO
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* Change handling of the TAB character from inserting spaces to the actual TAB character '\t' (both while reading from and writing(!) to files).

* Make ri compatible with all screen dimensions and X-based terminals.

* Enable the use of the Shift key to mark blocks for cut/copy (like MS-EDIT).

* Spell check

* Automatic C indentation (like vi)

* Mouse support

...and lots more!!
