simon/Monkey: Writing An Interpreter In Go @ d05aef023edf9ce627ee27c0fc6aadbd0140dde2

simon 8c820cfb7a fix some problem		%!s(int64=3) %!d(string=hai) anos
..
ast.go	8c820cfb7a fix some problem	%!s(int64=3) %!d(string=hai) anos
ast_test.go	7080ab8662 parsing expression -- integer literal expression	%!s(int64=3) %!d(string=hai) anos