--- a/README	Tue Mar 14 09:51:25 2017 -0700
+++ b/README	Tue Mar 14 11:26:55 2017 -0700
@@ -12,18 +12,18 @@
 <https://www.mercurial-scm.org/mailman/listinfo/evolve-testers>`_ to stay up to
 date with changes.
 
-This extensions:
+This extension:
 
-* enables the "changeset obsolescence" feature of Mercurial core
+* enables the “changeset evolution” feature of Mercurial core,
 
 * provides a set of commands to mutate your history,
 
 * issues several warning messages when troubles from some mutable appears in
   your repository,
 
-* provides a ``hg evolve`` command to deal with such "troubles".
+* provides an ``hg evolve`` command to deal with such "troubles",
 
-* improves performance of obsolescence markers exchanges and discovery during
+* improves performance of obsolescence marker exchanges and discovery during
   push and pull.
 
 Documentation