Add the settabvar() and gettabvar() functions.
Various runtime file updates.
diff --git a/runtime/doc/change.txt b/runtime/doc/change.txt
index 0aad840..35dd926 100644
--- a/runtime/doc/change.txt
+++ b/runtime/doc/change.txt
@@ -1139,7 +1139,7 @@
register. {not in Vi}
7. Selection and drop registers "*, "+ and "~
-Use these register for storing and retrieving the selected text for the GUI.
+Use these registers for storing and retrieving the selected text for the GUI.
See |quotestar| and |quoteplus|. When the clipboard is not available or not
working, the unnamed register is used instead. For Unix systems the clipboard
is only available when the |+xterm_clipboard| feature is present. {not in Vi}