Syntax ERROR in drushrc.php creation code in README.txt

the README.txt file says to :
echo "<?php $command_specific['dh-make-drupal']['version-control'] = 'git';" > ~/.drush/drushrc.php
the text $command_specific is interpreted as a variable and is replace with and empty string resulting
in and invalid drushrc.php file.
it should be
echo "<?php \$command_specific['dh-make-drupal']['version-control'] = 'git';" > ~/.drush/drushrc.php
have supplied a patch to rectify this