Quiz2 complete #212
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Quiz2 complete #212
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Added null and empty string handling to reverseWithStringConcat and reverseWithStringBuilder methods
Corrected a mistake in previous commit, assigned string value of "" instead of null in null cases
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Added null and empty string handling to methods, reverseWithStringConcat and reverseWithStringBuilder to return an empty string in the case of a null or empty input. This will prevent errors and create a more elegant program.