[PATCH] obsolete: fix minor module documentation issues

[liscju]

# HG changeset patch
# User liscju <piotr.listkiewicz at gmail.com>
# Date 1472804336 -7200
#      Fri Sep 02 10:18:56 2016 +0200
# Node ID c53ddb8f36d5e0efc20ebcdcbd95a5cf12912911
# Parent  f148bfa40489269be2e48046734f81065129847a
obsolete: fix minor module documentation issues

diff --git a/mercurial/obsolete.py b/mercurial/obsolete.py
--- a/mercurial/obsolete.py
+++ b/mercurial/obsolete.py
@@ -42,9 +42,9 @@ Examples:
 
     (A, ())
 
-- When changeset A is split into B and C, a single marker are used:
+- When changeset A is split into B and C, a single marker is used:
 
-    (A, (C, C))
+    (A, (B, C))
 
   We use a single marker to distinguish the "split" case from the "divergence"
   case. If two independent operations rewrite the same changeset A in to A' and