do not absorb vacuous copy operation, e.g. relevant when tooltip has focus but no selection, while the main text area has a selection but no focus;
#!/usr/bin/env bash
#
# Minimal Poly/ML startup script
THIS="$(cd "$(dirname "$0")"; pwd)"
export LD_LIBRARY_PATH="$THIS:$LD_LIBRARY_PATH"
export DYLD_LIBRARY_PATH="$THIS:$DYLD_LIBRARY_PATH"
exec "$THIS/poly" "$@"