fix a typo in the blocking paper

svn:r11021

doc/design-paper/blocking.html

@@ -1516,7 +1516,7 @@ For Internet cafe Windows computers that let you attach your own USB key,
 a USB-based Tor image would be smart. There's Torpark, and hopefully
 there will be more thoroughly analyzed and trustworthy options down the
 road. Worries remain about hardware or software keyloggers and other
-spyware, as well as and physical surveillance.
+spyware, as well as physical surveillance.
 
 <div class="p"><!----></div>
 If the system lets you boot from a CD or from a USB key, you can gain

doc/design-paper/blocking.tex

@@ -1425,7 +1425,7 @@ For Internet cafe Windows computers that let you attach your own USB key,
 a USB-based Tor image would be smart. There's Torpark, and hopefully
 there will be more thoroughly analyzed and trustworthy options down the
 road. Worries remain about hardware or software keyloggers and other
-spyware, as well as and physical surveillance.
+spyware, as well as physical surveillance.
 
 If the system lets you boot from a CD or from a USB key, you can gain
 a bit more security by bringing a privacy LiveCD with you. (This