diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst
index 384b0f1..c8f6e33 100644
--- a/Doc/library/itertools.rst
+++ b/Doc/library/itertools.rst
@@ -97,7 +97,7 @@
 
         def combinations(iterable, r):
             pool = tuple(iterable)
-	    if pool:
+            if pool:
                 n = len(pool)
                 vec = range(r)
                 yield tuple(pool[i] for i in vec)