Made parser non-permissive with help of Danny. Needs to be built twice when building from clean!
Added semicolon.
Removed disambiguator, let's hope it no longer necessary. Fixed whitespace ambiguity issues, perhaps in a round-about way. Seems to require a clean build to get changed. Remember to build twice when building from clean!
Moved optional literal to seperate productions to remove warning.
Removed superfluous Subquery RowConstructor, which was causing ambiguities.