Vim 8.1 release

Update version number and information.  Fix a couple of tests.
diff --git a/READMEdir/Contents b/READMEdir/Contents
index 76bd909..822eb2c 100644
--- a/READMEdir/Contents
+++ b/READMEdir/Contents
@@ -9,10 +9,10 @@
 		messages, shows current file name in window title, on-line
 		help, rectangular cut/paste, etc., etc., etc...
 
-		Version 8.0.  Also runs under UNIX, MS-Windows, Mac, etc.
-		vim80rt.tgz  contains the documentation and syntax files.
-		vim80bin.tgz contains the binaries.
-		vim80src.tgz contains the sources.
+		Version 8.1.  Also runs under UNIX, MS-Windows, Mac, etc.
+		vim81rt.tgz  contains the documentation and syntax files.
+		vim81bin.tgz contains the binaries.
+		vim81src.tgz contains the sources.
 		Author: Bram Moolenaar et al.