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0666f6482c
* Fixed ShellCheck.net warnings, including * exit -1: https://github.com/koalaman/shellcheck/wiki/SC2242 * cd || exit: https://github.com/koalaman/shellcheck/wiki/SC2164 * "$foo": https://github.com/koalaman/shellcheck/wiki/SC2086 * $(( $foo )): https://github.com/koalaman/shellcheck/wiki/SC2004 * grep | wc -l: https://github.com/koalaman/shellcheck/wiki/SC2126 * Use arrays instead of unquoted strings for loops and command arguments * Use (( ... )) arithmetic context instead of string comparisons * Use bash's built-in regex support instead of grep+sed+awk * Write errors to stderr