Incorporate Rocky's request, and some forced integer operation, and `linux` TERM

rocky / shell-term-background

POSIX shell scripts to figure out if a terminal has a dark or light background

GNU General Public License v2.0

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Closed egberts closed 4 years ago

egberts commented 4 years ago

restore is_sourced() BASH_SOURCE[0] back to unquoted.
Force it to integer mode for integer comparison because string comparison failed when leading zero appears during new pre-analysis for non-COLORFGBG/older VTE library.
Added linux TERM to the same logic as xterm*, gnome, and rxvt* TERMs.