Fix String dump

Author: ncw

ast/dump.go

@@ -43,7 +43,7 @@ func Dump(ast Ast) string {
 			v := fieldValue.Interface()
 			switch x := v.(type) {
 			case py.String:
-				args = append(args, fmt.Sprintf("%s=%q", fname, string(x)))
+				args = append(args, fmt.Sprintf("%s='%s'", fname, string(x)))
 			case py.Bytes:
 				args = append(args, fmt.Sprintf("%s=b'%s'", fname, string(x)))
 			case Identifier:

ast/dump_test.go

@@ -13,11 +13,11 @@ func TestDump(t *testing.T) {
 	}{
 		{nil, `<nil>`},
 		{&Pass{}, `Pass()`},
-		{&Str{S: py.String("potato")}, `Str(s="potato")`},
-		{&Str{S: py.String("potato")}, `Str(s="potato")`},
+		{&Str{S: py.String("potato")}, `Str(s='potato')`},
+		{&Str{S: py.String("potato")}, `Str(s='potato')`},
 		{&Bytes{S: py.Bytes("potato")}, `Bytes(s=b'potato')`},
 		{&BinOp{Left: &Str{S: py.String("one")}, Op: Add, Right: &Str{S: py.String("two")}},
-			`BinOp(left=Str(s="one"), op=Add(), right=Str(s="two"))`},
+			`BinOp(left=Str(s='one'), op=Add(), right=Str(s='two'))`},
 		{&Module{}, `Module(body=[])`},
 		{&Module{Body: []Stmt{&Pass{}}}, `Module(body=[Pass()])`},
 		{&Module{Body: []Stmt{&ExprStmt{Value: &Tuple{}}}}, `Module(body=[Expr(value=Tuple(elts=[], ctx=UnknownExprContext(0)))])`},