Bug#602094: apt_preferences man page could use some love from a native English speaker

[PJ Weisberg <pjweisberg@gmail.com>]

--- apt_preferences.5.xml	2010-10-14 05:31:19.000000000 -0700
+++ apt_preferences.5.new.xml	2010-11-01 22:18:40.000000000 -0700
@@ -56,16 +56,14 @@
 The APT preferences file does not affect the choice of instance, only
 the choice of version.</para>
 
-<para>Preferences are a strong power in the hands of a system administrator
-but they can become also their biggest nightmare if used without care!
-APT will not questioning the preferences so wrong settings will therefore
-lead to uninstallable packages or wrong decisions while upgrading packages.
-Even more problems will arise if multiply distribution releases are mixed
-without a good understanding of the following paragraphs.
-Packages included in a specific release aren't tested in and
-therefore doesn't always work as expected in older or newer releases or
-together with other packages from different releases.
-You have been warned.</para>
+<para>Preferences are a strong power in the hands of a system administrator,
+but they can also become your biggest nightmare if used without care!  APT will
+not question your preferences, so some settings may lead to uninstallable
+packages or wrong decisions while upgrading packages. Even more problems can
+arise from carelessly mixing packages from multiple distributions.  Packages
+included in a specific release aren't tested in and therefore won't always work
+as expected in older or newer releases or together with other packages from
+different releases.  You have been warned.</para>
 
 <para>Note that the files in the <filename>/etc/apt/preferences.d</filename>
 directory are parsed in alphanumeric ascending order and need to obey the