Shellcheck suggestions

Joel Grunbaum

2021-12-24 d2c44c5903537b478900c30c8255fc9d64549b6e

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