templatefuncs: only render text portion of minirst.format() result

When "keep" argument is provided, the function returns (text, pruned), where
pruned is a list of sections from the original plain text that were pruned from
the rendered result. Let's not output it together with the rendered HTML.

mercurial/templatefuncs.py

@@ -553,7 +553,7 b' def rstdoc(context, mapping, args):'
     text = evalstring(context, mapping, args[0])
     style = evalstring(context, mapping, args[1])
 
-    return minirst.format(text, style=style, keep=['verbose'])
+    return minirst.format(text, style=style, keep=['verbose'])[0]
 
 @templatefunc('separate(sep, args...)', argspec='sep *args')
 def separate(context, mapping, args):

tests/test-help.t

@@ -3138,7 +3138,7 b' Dish up an empty repo; serve it cold.'
   <p>
   which will prevent the pager from running.
   </p>
-  windows
+  
   </div>
   </div>
   </div>