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  1. BAR=1234 FOO=abcd; while IFS= read -r line; do eval 'echo "'"$line"'"'; done
Success #stdin #stdout 0.01s 5420KB
stdin
*** IMPORTANT TEMPLATE DOCUMENT ***

Notice when reading this:
   - There are supposed to be asterisks before and after the title on the first line.
   - There is supposed to be whitespace before these bullets.
   - The value $BAR should be written as 1234
stdout
*** IMPORTANT TEMPLATE DOCUMENT ***

Notice when reading this:
   - There are supposed to be asterisks before and after the title on the first line.
   - There is supposed to be whitespace before these bullets.
   - The value 1234 should be written as 1234