Revert "remove redundant py:if"

This reverts commit f83b22a5e3.

templates/site-layout.html

@@ -136,7 +136,9 @@
       <a title="Go to the first page of results."
 	 accesskey="a"
 	 href="${os.url_carry (start_index = 1)}">First</a>
+      </py:if>
 
+      <py:if test="os.show_prev_page_link">|
       <a title="Go to the previous page of results."
 	 accesskey="-"
 	 href="${os.url_carry (start_index = os.prev_page_index)}">Previous</a>
@@ -146,7 +148,8 @@
       <a title="Go to the next page of results."
 	 accesskey="+"
 	 href="${os.url_carry (start_index = os.next_page_index)}">Next</a>
-
+      </py:if>
+      <py:if test="os.show_next_page_link">|
       <a title="Go to the last page of results."
 	 accesskey="+"
 	 href="${os.url_carry (start_index = os.last_page_index)}">Last</a>