Fix example of HGRC template in help output
    
        | author | Oben Sonne <obensonne@googlemail.com> | 
    
        | date | Wed, 05 Oct 2016 11:17:48 +0200 | 
    
    
        | parents | 003e92ae20da | 
    
        | children | 5334581e231a | 
    
        | branches/tags | (none) | 
    
        | files | prompt.py | 
Changes
    
--- a/prompt.py	Wed Oct 05 10:45:22 2016 +0200
+++ b/prompt.py	Wed Oct 05 11:17:48 2016 +0200
@@ -102,7 +102,7 @@
     The format string may also be defined in an hgrc file::
 
         [prompt]
-        template = "{currently at {bookmark}}"
+        template = {currently at {bookmark}}
 
     This is used when no format string is passed on the command line.
     '''