copied from https://yourbasic.org/golang/formatting-byte-size-to-human-readable-format/.

Returns the last n chars, or the entire string if the requested length is greater than the length of the string.

Returns the portion str after the last occurrance of chars, or the entire str if chars are not found.

MaskString omits no more than half of the string.

Same as Obj(), but trim leading and trailing quotes if it's just a string.

RemoveDuplicates returns a filtered string slice without repeated entries.