Vim 8.1 release

Update version number and information.  Fix a couple of tests.
diff --git a/runtime/doc/pi_getscript.txt b/runtime/doc/pi_getscript.txt
index 1629a91..4190706 100644
--- a/runtime/doc/pi_getscript.txt
+++ b/runtime/doc/pi_getscript.txt
@@ -1,4 +1,4 @@
-*pi_getscript.txt*  For Vim version 7.0.  Last change: 2017 Aug 01
+*pi_getscript.txt*  For Vim version 8.1.  Last change: 2017 Aug 01
 >
 		GETSCRIPT REFERENCE MANUAL  by Charles E. Campbell
 <