diff --git a/IPython/core/alias.py b/IPython/core/alias.py
index f30d6ff..aa55137 100644
--- a/IPython/core/alias.py
+++ b/IPython/core/alias.py
@@ -169,12 +169,12 @@ class Alias(object):
         if cmd.find('%l') >= 0:
             cmd = cmd.replace('%l', rest)
             rest = ''
-		
+        
         if nargs==0:
-			if cmd.find('%%s') >= 1:
-				cmd = cmd.replace('%%s', '%s')
-			# Simple, argument-less aliases
-			cmd = '%s %s' % (cmd, rest)
+            if cmd.find('%%s') >= 1:
+                cmd = cmd.replace('%%s', '%s')
+            # Simple, argument-less aliases
+            cmd = '%s %s' % (cmd, rest)
         else:
             # Handle aliases with positional arguments
             args = rest.split(None, nargs)