Test suite: fix gherkin semantics.

features/torified_browsing.feature

@@ -140,7 +140,7 @@ Feature: Browsing the web using the Tor Browser
     And I can save the current page as "index.html" to the persistent Tor Browser directory
     And I close the Tor Browser
     When I start the Tor Browser
-    When I open the address "file:///home/amnesia/Persistent/Tor Browser/index.html" in the Tor Browser
+    And I open the address "file:///home/amnesia/Persistent/Tor Browser/index.html" in the Tor Browser
     Then "Tails - About" has loaded in the Tor Browser
     And I can print the current page as "output.pdf" to the persistent Tor Browser directory