[(s1 v1) (s2 v2)]

foo: [(s1 v1) (s2 %1= v2) (s3 %1)]

[]

[( s1 "foo" )]

foo: [(s1 "foo")
      (s2 %1= "bar")
      (s3 %1)]

foo: [(s1 "foo")
      (s2 %1= "bar")
      (s3 "baz\"2")]

[( s1 "foo
bar" )]

[( s1 "foo
\"
\\"
\\\"
bar
" )]

[( s1  "h\"atten Sie gerne Umlaute?")]
