Humanize.truncateWords returns null when input has less number of words

[KrishnaPG]

Humanize.truncateWords("hello world", 2)
null
Humanize.truncateWords("hello world", 1)
"hello ..."

The primary reason one wants to use methods such as truncateWords is if the size increases beyond certain point, truncate it (and leave it untouched if input is smaller in length). Currently the method is returning null if input has less no. of words than requested.