Add multiline support #32
Description
Currently everything has to be on the same line which can be a bit annoying at times if you try to chain together a lot of commands or options. It'd be nice to support having multiple lines that continue if the line ends in an unterminated string (should multiline strings include newlines?), the and token (&&), the or token (||) or when the newline is escaped by a backslash (). After the first line, additional lines should be indented to indicate that they are just continuations of the first line.