Put note in INSTALL about the extra xmlns attribute inserted by

later versions of the xhtml library (which causes some tests
to fail).  Thanks to Leif LeBaron for pointing this out.


git-svn-id: https://pandoc.googlecode.com/svn/trunk@858 788f1e2b-df1e-0410-8736-df70ead52e1b

INSTALL

@@ -40,6 +40,15 @@ X).  If you're using Windows, you can install [Cygwin].
 
         make test
 
+    Note: if you see errors like the following, they're due to differences
+    between different versions of the xhtml library, and can safely be
+    disregarded:
+
+        2c2
+        < <html xmlns="http://www.w3.org/1999/xhtml"
+        ---
+        > <html
+
 4.  Install:
 
         sudo make install