* doc/apt_preferences.5.xml:

  - fix a=sid vs. n=sid typo, thanks Ansgar Burchardt!

debian/changelog

@@ -34,6 +34,7 @@ apt (0.7.26) UNRELEASED; urgency=low
   * doc/apt_preferences.5.xml:
     - fix two typos and be more verbose in the novice warning.
       Thanks to Osamu Aoki for pointing it out! (Closes: #567669)
+    - fix a=sid vs. n=sid typo, thanks Ansgar Burchardt!
   * apt-pkg/deb/dpkgpm.cc:
     - fix error message construction in OpenLog()
     - if available store the Commandline in the history

doc/apt_preferences.5.xml

@@ -594,7 +594,7 @@ Pin-Priority: 900
 
 Explanation: Debian unstable is always codenamed with sid
 Package: *
-Pin: release a=sid
+Pin: release n=sid
 Pin-Priority: 800
 
 Package: *