Antiquotation (
${expr}) is supported in indented strings.
Since
${and''have special meaning in indented strings, you need a way to quote them.${can be escaped by prefixing it with''(that is, two single quotes), i.e.,''${.''can be escaped by prefixing it with', i.e.,'''. Finally, linefeed, carriage-return and tab characters can be written as''\n,''\r,''\t.