make flags analysis: use simpler variable names * lib/am/header-vars.am (am__make_running_with_option): Here. Now that we expect to be run in a subshell, we don't have to worry about being namespace-safe. And '$foo' is much more pleasant to read than '$am__foo' -- and pleasant code tends to be more correct. (am__make_dryrun, am__make_keepgoing): Adjust. Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>