the backtick method proposed by @Akira1364 is substantially cleaner and easier to read,
On contrary, it introduces something very dirty to Pascal language -- significant whitespaces at the end of line.
Inside these multiline strings, it is not obvious where the line ends. It is a very dirty feature.
In a language which should have clean syntax, you should safely rely on that there cannot be significant whitespaces at the end of a line.
With multiline string, you don't see where a line actually ends. You have to check it, and in Lazarus editor, as it is now, even that checking is not so easy -- the caret can be put anywhere beyond the actual end of the line.
So, with multiline strings, Lazarus editor will need to remove this feature. And it is a very nice feature -- I wouldn't like the caret to go left-right when I am going up-down through code.
Another beautiful feature which the editor will have to remove is automatically removing spaces from line endings when saving the unit file.
The editor uses the fact that in Pascal, spaces at the end of the line are always insignificant.
And the programmer should always be able to safely rely on that.
Some other languages do not care that much about clean syntax. In Pascal, clean syntax has always been important.
So, please do not introduce significant whitespaces at line endings in Pascal.