Added a clarification when passing files instead of directories as arguments.
-rw-r--r-- 62 .gitignore
-rw-r--r-- 1555 Makefile
-rw-r--r-- 4631 finddup.1
-rw-r--r-- 20131 finddup.c
-rw-r--r-- 35147 gpl-3.0.txt