Use this function before
unescape the following sequences of characters: \n, \r, \t and \.
The purpose is to easily write those characters in a search entry.
Note that unescaping the search text is not needed for regular expression searches.
Use this function to escape the following characters: \n, \r, \t and .
For a regular expression search, use
One possible use case is to take the GtkTextBuffer's selection and put it in a search entry. The selection can contain tabulations, newlines, etc. So it's better to escape those special characters to better fit in the search entry.