\textbf{mytest() \{}
 \textbf{  if grep -q 'i have a gub' *}
 \textbf{  then}
 \textbf{    result=bad}
 \textbf{  else}
 \textbf{    result=good}
 \textbf{  fi}
 \textbf{  echo this revision is $result}
 \textbf{  hg bisect $result}
 \textbf{\}}