Clarify / fix some changelog entries.

debian/changelog

@@ -18,14 +18,14 @@ tails (0.20~rc1) unstable; urgency=low
   - Disable the pre-defined Pidgin accounts so they do not auto-connect
     on Pidgin start.
   - Include information about Alsa in WhisperBack reports.
-  - Restrict access to ptrace. While this setting was enabled by default in
-    Debian's Linux 3.9.6-1, it will be disabled in 3.9.7-1, so let's
-    re-enable it ourselves explicitly.
+  - Explicitly restrict access to ptrace. While this setting was enabled
+    by default in Debian's Linux 3.9.6-1, it will later disabled in 3.9.7-1.
+    It's unclear what will happen next, so let's explicitly enable it ourselves.
   - Do not display dialog when a message is sent in Claws Mail.
 
   * Localization
   - Many translation updates all over the place.
-  - Merge all Tails-related POT files into one, and make us of intltoolize
+  - Merge all Tails-related POT files into one, and make use of intltoolize
     for better integration with Transifex.
 
  -- Tails developers <tails@boum.org>  Tue, 30 Jul 2013 14:19:57 +0200