Truncate to maxLength characters including the ellipsis. Returns the text unchanged when it already fits (so a caller can tell "no shortening possible" by identity). Code points, not UTF-16 units, so an astral character is never split.
maxLength
Truncate to
maxLengthcharacters including the ellipsis. Returns the text unchanged when it already fits (so a caller can tell "no shortening possible" by identity). Code points, not UTF-16 units, so an astral character is never split.