windmillium/Code-Katas — comment on commit a4439c5cb60dec204ddf9ee6c7309715291db285
File:  line 0
By windmillium:

Puts'ing from a method is a side effect, as such it should be clearly demarcated, as you say in a print method. You can also see here that there is a clear delineation between the 'library' and the use of the library. Now you are more free to use the anagram finder in another situation.