parsergen - fix newline parsing (again)

parsergen - fix newline parsing (again)

Add a test-case to oceani-tests.mdc which fails, but shouldn't.
It fails because expressions are treated as line-like, so newlines
aren't ignored.

I realize that having linelike symbols being those that are followed by
a newline really doesn't work.
So go back to the original idea that "linelike symbols are those which
contain a newline".

Then a state starts a line if it is at the start of a linelike symbol.

This simplifies the code, seems to work correctly for existing tests,
and allows the new test to pass.

Signed-off-by: NeilBrown <neil@brown.name>