REF run.sh: no need for bash, no need for export #2
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/bin/bashisn't POSIX,/bin/shis. Since there is no need for bashstrictly speaking, using a POSIX sh shell in the shebang is much more
portable.
In addition, the export keywords were useless since it is possible to
set the variables much in the same way for that binary only (with the
additional benefit of not leaking variables in any shell).