Tests that the tool can concatenate large strings, that strings
concatenated in different ways are still equal, and that the
lengths of the strings are as expected. Note that there is no
maximum limit of string sizes in Modelica which essentially means
the size is unlimited. This test uses a rather small limit of 65536
characters for practical reasons (making the size of the test
small). That should also make it possible to run this test on a
16-bit platform (maybe there are some Modelica 16-bit embedded
tools?). Reading files >1GB should be expected of a Modelica
tool and indeed any modern programming language. If you fail this
test, try to make sure your tool handles very large strings
(architecture limit) rather than increasing the size arbitrarily.