From 264945a1f77598572971750db89b0ee7cdf69524 Mon Sep 17 00:00:00 2001
From: Michael Scherer <misc@zarb.org>
Date: Sun, 13 Oct 2013 13:43:16 +0200
Subject: [PATCH] adding a single comma at the end of the options list confuse
 the module

it start to duplicate line, because this create
a empty option in the list, and so the module add a new line along the previous
one. See

>>> ' a,b, '.strip().split(',')
['a', 'b', '']
---
 library/system/authorized_key | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/library/system/authorized_key b/library/system/authorized_key
index 26494267d64..269cb728493 100644
--- a/library/system/authorized_key
+++ b/library/system/authorized_key
@@ -185,6 +185,9 @@ def parseoptions(options):
     if options:
         options_list = options.strip().split(",")
         for option in options_list:
+            # happen when there is comma at the end
+            if option == '':
+                continue
             if option.find("=") != -1:
                 (arg,val) = option.split("=", 1)
             else: