cards: cosmetic/indentation fix: use tabs, not spaces

Change-Id: I5d9cbdb0ecbee783729d0a208d12f8e59ca957ff
diff --git a/pySim/cards.py b/pySim/cards.py
index 022182c..a49fe43 100644
--- a/pySim/cards.py
+++ b/pySim/cards.py
@@ -175,7 +175,7 @@
 	each possible provider uses a specific record number in each EF. The
 	indexes used are ( where N is the number of providers supported ) :
 	 - [2 .. N+1] for the operator name
-     - [1 .. N] for the programable EFs
+	 - [1 .. N] for the programable EFs
 
 	* 3f00/7f4d/8f0c : Operator Name