bos@144: $ \textbf{cat .hg/hgrc}
bos@144: [hooks]
bos@167: pretxncommit.whitespace = hg export tip | (! egrep -q '^\textbackslash{}+.*[ \textbackslash{}t]$')
bos@144: $ \textbf{echo 'a ' > a}
bos@144: $ \textbf{hg commit -A -m 'test with trailing whitespace'}
bos@144: adding a
bos@144: transaction abort!
bos@144: rollback completed
bos@273: abort: pretxncommit.whitespace hook exited with status 1
bos@144: $ \textbf{echo 'a' > a}
bos@144: $ \textbf{hg commit -A -m 'drop trailing whitespace and try again'}