minor readme edits

README.md

@@ -228,18 +228,18 @@ apt::source { "archive.ubuntu.com-${lsbdistcodename}-backports":
 
 ### Manage login configuration settings for an APT source or proxy in `/etc/apt/auth.conf`
 
-Starting with APT version 1.5 you can define login configuration settings (like
-username and password) for APT sources or proxies that require authentication
-in the file `/etc/apt/auth.conf`. This is preferable to embedding login
-information directly in `source.list` entries which are usually world-readable.
+Starting with APT version 1.5, you can define login configuration settings, such as
+username and password, for APT sources or proxies that require authentication
+in the `/etc/apt/auth.conf` file. This is preferable to embedding login
+information directly in `source.list` entries, which are usually world-readable.
 
-The file `/etc/apt/auth.conf` follows the format of netrc (as used by ftp or
+The `/etc/apt/auth.conf` file follows the format of netrc (used by ftp or
 curl) and has restrictive file permissions. See
 https://manpages.debian.org/testing/apt/apt_auth.conf.5.en.html for details.
 
 Use the optional `apt::auth_conf_entries` parameter to specify an array of
 hashes containing login configuration settings. These hashes may only contain
-the keys `machine`, `login` and `password`.
+the `machine`, `login` and `password` keys.
 
 ```puppet
 class { 'apt':