Fixed parsing error on Go 1.19

Signed-off-by: Antonio Navarro Perez <antnavper@gmail.com>

gnovm/pkg/repl/repl.go

@@ -2,6 +2,7 @@ package repl
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"go/ast"
 	"go/format"
@@ -118,7 +119,7 @@ func (r *Repl) Process(input string) (out string, err error) {
 		return r.handleDeclarations(decl)
 	}
 
-	return "", fmt.Errorf("error parsing code as expression (error: %w) and as declarations (error: %w)", expErr, declErr)
+	return "", fmt.Errorf("error parsing code: %q", errors.Join(expErr, declErr))
 }
 
 func (r *Repl) handleExpression(e *ast.File) (string, error) {

gnovm/pkg/repl/repl_test.go

@@ -34,7 +34,7 @@ var fixtures = []struct {
 			},
 			{
 				Line:  "var a := 1",
-				Error: "error parsing code as expression (error: error formatting code: 9:8: expected type, found ':=') and as declarations (error: error formatting code: 6:7: expected type, found ':=')",
+				Error: "error parsing code: \"error formatting code: 9:8: expected type, found ':='\\nerror formatting code: 6:7: expected type, found ':='\"",
 			},
 		},
 	},