Print raw result of ast prettifying in function 'testDoc'
Remove first separation element in function 'topLevel'
Fix instance PrettyAst Context
Fix instance PrettyAst Exp
Fix compile error in function 'testDoc'
Fix instance PrettyAst Pat
Fix instance PrettyAst SpecialCon
Fix instances QName and Name. Info points of QName are the same as points of child Name. Also several related changes