* Fix missing character typo Signed-off-by: Craig Adam <[email protected]> * Update substitute-string.md Signed-off-by: Naarcha-AWS <[email protected]> --------- Signed-off-by: Craig Adam <[email protected]> Signed-off-by: Naarcha-AWS <[email protected]> Co-authored-by: Naarcha-AWS <[email protected]>