Fix string truncation to properly handle multi-byte characters

[kipkaev55]

Description:

This feature change aims to fix the issue with truncating strings encoded in a multi-byte character set. In the current implementation, truncation was occurring at the byte level, which could lead to incorrect handling of multi-byte characters, such as UTF-8 characters.

import (
    // ...
    "unicode/utf8"
    // ...
)
// ...
func truncate(s string, max int) string {
	if utf8.RuneCountInString(s) <= max || max < 0 {
		return s
	}
	runes := []rune(s)
	if max > 3 {
		return string(runes[:max-3]) + "..."
	}
	return string(runes[:max])
}

Changes:

• Changes have been made to the logic of string truncation to account for multi-byte characters.
• The usage of the unicode/utf8 package has been added to accurately count characters in the string.
• String truncation now occurs at the character level, ensuring proper behavior when dealing with multi-byte characters.

Why It Matters:

The problem with truncating strings encoded in a multi-byte character set can lead to unpredictable behavior and errors in the application, especially when it deals with multilingual data or text containing special characters.