Incorrect and inconsistent errors for x.y and y.getY() in constraint expressions

Parser flags space before/after dot incorrectly and inconsistently.
The error message for $e is grossly misleading. The expected
behaviour is to accept all of the 6 forms given below.

declare Student
name : String @key
end

rule "Subject grade points"
when
#OK $a : Student( $someStudent.name != null )
#OK $b : Student( $someStudent .name != null )
#BAD $c : Student( $someStudent. name != null )
#OK $d : Student( $someStudent.getName() != null )
#BAD $e : Student( $someStudent .getName() != null )
#OK $f : Student( $someStudent. getName() != null )
then
end