regex with literal (ie automatically replace '(' with '\(', etc) )

[Diggory]

> Your suggestion does not work; try for yourself by replacing 
> the $$ by \$
> in my code. Is that a bug in std.regex' doc?
> eg:
> replace("",regex(``),`\$`);
> => invalid format string in regex replace
>
> However everything works fine with $$, see my code above.

Either the doc or the code should probably be changed then so 
they are consistent.