vendor: Mega update all dependencies

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4080

vendor/github.com/onsi/gomega/gstruct/errors/nested_types.go

@@ -0,0 +1,72 @@
+package errors
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/onsi/gomega/types"
+)
+
+// A stateful matcher that nests other matchers within it and preserves the error types of the
+// nested matcher failures.
+type NestingMatcher interface {
+	types.GomegaMatcher
+
+	// Returns the failures of nested matchers.
+	Failures() []error
+}
+
+// An error type for labeling errors on deeply nested matchers.
+type NestedError struct {
+	Path string
+	Err  error
+}
+
+func (e *NestedError) Error() string {
+	// Indent Errors.
+	indented := strings.Replace(e.Err.Error(), "\n", "\n\t", -1)
+	return fmt.Sprintf("%s:\n\t%v", e.Path, indented)
+}
+
+// Create a NestedError with the given path.
+// If err is a NestedError, prepend the path to it.
+// If err is an AggregateError, recursively Nest each error.
+func Nest(path string, err error) error {
+	if ag, ok := err.(AggregateError); ok {
+		var errs AggregateError
+		for _, e := range ag {
+			errs = append(errs, Nest(path, e))
+		}
+		return errs
+	}
+	if ne, ok := err.(*NestedError); ok {
+		return &NestedError{
+			Path: path + ne.Path,
+			Err:  ne.Err,
+		}
+	}
+	return &NestedError{
+		Path: path,
+		Err:  err,
+	}
+}
+
+// An error type for treating multiple errors as a single error.
+type AggregateError []error
+
+// Error is part of the error interface.
+func (err AggregateError) Error() string {
+	if len(err) == 0 {
+		// This should never happen, really.
+		return ""
+	}
+	if len(err) == 1 {
+		return err[0].Error()
+	}
+	result := fmt.Sprintf("[%s", err[0].Error())
+	for i := 1; i < len(err); i++ {
+		result += fmt.Sprintf(", %s", err[i].Error())
+	}
+	result += "]"
+	return result
+}