PR07: Test the parsing of == and += in macro definitions. Trip the parser so we don't get any further. @> 1. Test with no equals. @$@@{No equals in this macro definition.@} 2. Test with ==. @$@==@{No equals in this macro definition.@} 3. Test with +=. @$@+=@{No equals in this macro definition.@} 4. Test with syntax errors. @$@++@{No equals in this macro definition.@} @A@ @$@@+=@{No equals in this macro definition.@} @A@ @$@+==+@{No equals in this macro definition.@} @A@ @$@=+@{No equals in this macro definition.@} @A@ @$@@=@=@{No equals in this macro definition.@} @A@ @$@@+@=@{No equals in this macro definition.@} @A@