A simple test follows:
Hello, world!
Now get into variable nesting:
My message.
My message.
My message.
My message.
My message.
My message.
My message.
My message.
More deep nesting...
My message.
one
one
Nesting inside nesting...
two
two
two
two
Test underscores...
out
out
Test literals in a variable expression:
1 + 2 = 3
out3
true
Test #empty
"hello" + #empty = hello
#empty + "hello" = hello
3 + #empty = 3
#empty + 4 = 4
3 + 4 + #empty = 7
3 + #empty + 4 = 34
#empty + 3 + 4 = 34