Revert 'Fix a typo 'iff' => 'if''. iff is an abreviation of if and only if. See: http://en.wikipedia.org/wiki/If_and_only_if Commit 164767

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164768 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/DSAextract.py b/utils/DSAextract.py
index ba762bd..89dece1 100644
--- a/utils/DSAextract.py
+++ b/utils/DSAextract.py
@@ -1,7 +1,7 @@
 #! /usr/bin/python
 
 #this is a script to extract given named nodes from a dot file, with
-#the associated edges.  An edge is kept if for edge x -> y
+#the associated edges.  An edge is kept iff for edge x -> y
 # x and y are both nodes specified to be kept.
 
 #known issues: if a line contains '->' and is not an edge line