fix example typo
diff --git a/examples/explore_ast.py b/examples/explore_ast.py
index 392e78a..f6be329 100644
--- a/examples/explore_ast.py
+++ b/examples/explore_ast.py
@@ -150,7 +150,7 @@
#~ while_cond.right.show()
#
-# That's if for the example. I hope you now see how easy it is to
+# That's it for the example. I hope you now see how easy it is to
# explore the AST created by pycparser. Although on the surface it
# is quite complex and has a lot of node types, this is the
# inherent complexity of the C language every parser/compiler