--- a/hgext/fix.py	Mon Jan 07 21:43:06 2019 +0900
+++ b/hgext/fix.py	Mon Jan 07 15:25:41 2019 -0800
@@ -62,8 +62,8 @@
 in a text file by ensuring that 'sort' runs before 'head'::
 
   [fix]
-  sort:command = sort --numeric-sort
-  head:command = head --lines=10
+  sort:command = sort -n
+  head:command = head -n 10
   sort:pattern = numbers.txt
   head:pattern = numbers.txt
   sort:priority = 2