Let 'v' flag in 'concealcursor' apply to all lines in the Visual area.
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 13932e0..17c6a46 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1721,6 +1721,7 @@
i Insert mode
c Command line editing, for 'incsearch'
+ 'v' applies to all lines in the Visual area, not only the cursor.
A useful value is "nc". This is used in help files. So long as you
are moving around text is concealed, but when starting to insert text
or selecting a Visual area the concealed text is displayed, so that