[erlang-questions] adding slashes for special chars

[Andrey Shnayder]

Hi, Erlang team.
I want to add slashes before some characters in a string - single quote,
double quote, backslash.
I have not found any function that implement this, therefore I use
regexp:gsub function, but I have a trouble with backslashes:

*69> regexp:gsub("qwert\\asdf", "\\", "\\\\").
{error,{unterminated,"\\"}}*

May you help me, please?
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