runtime(doc): clarify why E195 is returned

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/starting.txt b/runtime/doc/starting.txt
index a1c9d1d..b8ffa65 100644
--- a/runtime/doc/starting.txt
+++ b/runtime/doc/starting.txt
@@ -1,4 +1,4 @@
-*starting.txt*  For Vim version 9.1.  Last change: 2024 May 05
+*starting.txt*  For Vim version 9.1.  Last change: 2024 May 18
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -1712,7 +1712,8 @@
 			|viminfo-file-name| above).
 			If [!] is given, then any information that is
 			already set (registers, marks, |v:oldfiles|, etc.)
-			will be overwritten.
+			will be overwritten.  "E195" may be given, when
+			'viminfofile' has been set to "NONE".
 
 			*:wv* *:wviminfo* *E137* *E138* *E574* *E886* *E929*
 :wv[iminfo][!] [file]	Write to viminfo file [file] (default: see