Merge "Block files without trailing newlines"

am: 9f1e2b53

Change-Id: I3776436edf8a24db6e2de60fd257295072997eac

PREUPLOAD.cfg

+[Hook Scripts]
+whitespace = tools/whitespace.sh ${PREUPLOAD_FILES}

tools/whitespace.sh

+#!/bin/bash
+
+RESULT=0
+
+for i in "$@"; do
+  a="`tail -c 1 "$i"`"
+  if [ "$a" != "" ]; then
+    echo "$i does not have a trailing newline" 1>&2
+    RESULT=-1
+  fi
+done
+
+exit $RESULT