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    process_files() with the base path as 'path'

...
                process it
            if it is a directory
                process_files() with this dir as 'path'

    list_of_all_files = process_files() with the base path as 'path'

...
                process_files() with this dir as 'path'
                add the files returned from process_files() to our lis
+t of files
        return our list of files

process_files ($base_path);

...
        }
    }
}

process_files ($base_path);

...
    # NOTE: we're returning the list of files
    return @files;
}

# Accepts one argument: the full path to a directory.
# Returns: A list of files that end in '.html' and have been
...
        map { -d $_ ? get_new_htmls ($_) : $_ }
        @files;
}