#3 Allow "unescaping" of replacement text

[Murali Krishnan]

Currently, it is not possible to include a newline in the replacement text when doing search and replace. If "\n" is used, it is inserted as the sequence '\' and 'n'.

To get around this, there needs to be a way to indicated that the string should be "unescaped", or have the escaped sequence translated to the characters they represent.