coloured $ according to return status

Joel Grunbaum

2020-06-21 5eb355e5a062bb4e56a0a44073bfce38bf4dfc3f

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extra-keys = [ \
 ['ESC','|','/','HOME','UP','END','-','DEL'], \
 ['TAB','CTRL','ALT','LEFT','DOWN','RIGHT','_','BKSP'] \
]