ORIGINAL STRING : [ \u{2006} Good morning world! \u{2000} \u{2001}\u{2002} ]
mb_ltrim [Trimmed Left]....: [Good morning world! \u{2000} \u{2001}\u{2002} ]
mb_rtrim [Trimmed Right]...: [ \u{2006} Good morning world!]
mb_trim [Trimmed Both]....: [Good morning world!]