churn: allow whitespaces as delimiter in aliases

churn: allow whitespaces as delimiter in aliases

it was exactly on space character before.

--- a/hgext/churn.py	Sat Mar 29 17:16:39 2008 +0100
+++ b/hgext/churn.py	Fri Mar 28 11:17:10 2008 +0300
@@ -155,7 +155,7 @@
 
         for l in f.readlines():
             l = l.strip()
-            alias, actual = l.split(" ")
+            alias, actual = l.split()
             aliases[alias] = actual
 
         return aliases