Merge pull request 'fix last truncate bug.' (#83) from fix-truncate into develop

Reviewed-on: https://git.openi.org.cn/OpenI/aiforge/pulls/83

modules/base/tool.go

@@ -285,7 +285,7 @@ func Subtract(left interface{}, right interface{}) interface{} {
 // EllipsisString returns a truncated short string,
 // it appends '...' in the end of the length of string is too large.
 func EllipsisString(str string, length int) string {
-	if utf8.RuneCountInString(str) <= 3 {
+	if length <= 3 {
 		return "..."
 	}
 	if utf8.RuneCountInString(str) <= length {