[dev] [st] Latest git - Nano with syntax highlighting strange bug

[hadrien . lacour]

Hello,

I've recently changed from urxvt to st and noticed a bug when using nano which 
will be easier to describe with a short gif: https://a.cocaine.ninja/xtlajf.gif
This issue happens ONLY when I change "static unsigned int tabspaces" from 8 to 
4 in the config file.