Backslash-hell can be solved in ASCII-based languages too. E.g. in ruby there are several ways to have a string literal:
"hello world"
"hello, #{name}!" # interpolation
%{hello world}
%{hello, #{name}!} # interpolation
%{hello, "#{name}"} # interpolation with quotes
%|hello, "#{name}"| # you can use other kinds of surrounding "brackets" if you don't like curly ones