1 <screen><prompt>$</prompt> <userinput>cat .hg/hgrc</userinput>

2 [hooks]

3 pretxncommit.whitespace = hg export tip | (! egrep -q '^\+.*[ \t]$')

4 <prompt>$</prompt> <userinput>echo 'a ' &gt; a</userinput>

5 <prompt>$</prompt> <userinput>hg commit -A -m 'test with trailing whitespace'</userinput>

6 adding a

7 transaction abort!

8 rollback completed

9 abort: pretxncommit.whitespace hook exited with status 1

10 <prompt>$</prompt> <userinput>echo 'a' &gt; a</userinput>

11 <prompt>$</prompt> <userinput>hg commit -A -m 'drop trailing whitespace and try again'</userinput>

12 </screen>