[fpc-pascal] Feature "Multiline strings" added

[Michael Van Canneyt]

On Sun, 27 Jul 2025, Alexey T. via fpc-pascal wrote:

> hello,
>
> Let's delete custom very special FPC variant with ticks. leave only Delphi 
> variant, please. in English it is maybe called as 'align implementation with 
> Delphi'.

It is aligned with Delphi ?

> why? to keep the same source when changing objfpc/delphi mode.

As said, pas2js alread has this, and I want to maintain compatibility between
FPC and pas2js.

The used mode has no influence on the support for backtick or not.
Both variants will work in objfpc mode.

Michael.