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

2 [hooks]

3 pretxncommit.whitespace = .hg/check_whitespace.py

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

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

6 a, line 2: trailing whitespace added

7 commit message saved to .hg/commit.save

8 transaction abort!

9 rollback completed

10 abort: pretxncommit.whitespace hook exited with status 1

11 <prompt>$</prompt> <userinput>sed -i 's, *$,,' a</userinput>

12 <prompt>$</prompt> <userinput>hg commit -A -m 'trimmed trailing whitespace'</userinput>

13 a, line 2: trailing whitespace added

14 commit message saved to .hg/commit.save

15 transaction abort!

16 rollback completed

17 abort: pretxncommit.whitespace hook exited with status 1

18 </screen>