#!/bin/sh
 
 ! for f in $(git ls-files | grep -v \\.diff$); do
     file $f | grep -q ' text' || continue
     grep -q '[[:blank:]]$' $f && echo $f: trailing whitespace
     tail -n1 $f | read -r _ || echo $f: no newline at end of file
     tail -n1 $f | grep -q '^$' && echo $f: empty line at end of file
 done | grep . >&2