Add a test for leading arguments

tests/end2end/data/search.html

@@ -16,6 +16,7 @@
             BAZ<br/>
             space travel<br/>
             /slash<br/>
+            -r reversed<br/>
             <a class="toselect" href="hello.txt">follow me!</a><br/>
         </p>
     </body>

tests/end2end/features/search.feature

@@ -45,6 +45,12 @@ Feature: Searching on a page
         And I wait for "search found /slash" in the log
         Then "/slash" should be found
 
+    Scenario: Searching with arguments at start of search term
+        When I run :set-cmd-text -s /-r reversed
+        And I run :command-accept
+        And I wait for "search found -r reversed" in the log
+        Then "-r reversed" should be found
+
     # This doesn't work because this is QtWebKit behavior.
     @xfail_norun
     Scenario: Searching text with umlauts