patch 8.1.1270: cannot see current match position

Problem:    Cannot see current match position.
Solution:   Show "3/44" when using the "n" command and "S" is not in
            'shortmess'. (Christian Brabandt, closes #4317)
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 985137b..6a73180 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1789,7 +1789,7 @@
 	'scrolloff'	+ 0		no scroll offset
 	'shelltemp'	- {unchanged}	{set vim default only on resetting 'cp'}
 	'shiftround'	+ off		indent not rounded to shiftwidth
-	'shortmess'	& ""		no shortening of messages
+	'shortmess'	& "S"		no shortening of messages
 	'showcmd'	& off		command characters not shown
 	'showmode'	& off		current mode not shown
 	'sidescrolloff'	+ 0		cursor moves to edge of screen in scroll
@@ -6563,8 +6563,8 @@
 	function to get the effective shiftwidth value.
 
 						*'shortmess'* *'shm'*
-'shortmess' 'shm'	string	(Vim default "filnxtToO", Vi default: "",
-							POSIX default: "A")
+'shortmess' 'shm'	string	(Vim default "filnxtToOS", Vi default: "S",
+							POSIX default: "AS")
 			global
 	This option helps to avoid all the |hit-enter| prompts caused by file
 	messages, for example  with CTRL-G, and to avoid some other messages.
@@ -6604,6 +6604,8 @@
 	  q	use "recording" instead of "recording @a"
 	  F	don't give the file info when editing a file, like `:silent`
 		was used for the command
+	  S     do not show search count message when searching, e.g.
+	        "[1/5]"
 
 	This gives you the opportunity to avoid that a change between buffers
 	requires you to hit <Enter>, but still gives as useful a message as
diff --git a/runtime/doc/pattern.txt b/runtime/doc/pattern.txt
index 90c33ad..fc4502d 100644
--- a/runtime/doc/pattern.txt
+++ b/runtime/doc/pattern.txt
@@ -152,6 +152,17 @@
 All matches for the last used search pattern will be highlighted if you set
 the 'hlsearch' option.  This can be suspended with the |:nohlsearch| command.
 
+When 'shortmess' does not include the "S" flag, Vim will automatically show an
+index, on which the cursor is. This can look like this: >
+
+  [1/5]		Cursor is on first of 5 matches.
+  [1/>99]	Cursor is on first of more than 99 matches.
+  [>99/>99]	Cursor is after 99 match of more than 99 matches.
+  [?/??]	Unknown how many matches exists, generating the
+		statistics was aborted because of search timeout.
+
+Note: the count does not take offset into account.
+
 When no match is found you get the error: *E486* Pattern not found
 Note that for the |:global| command this behaves like a normal message, for Vi
 compatibility.  For the |:s| command the "e" flag can be used to avoid the
@@ -301,6 +312,14 @@
 it's used again it fails.  Usually this means there is something wrong with
 the pattern.
 
+								*E956*
+In very rare cases a regular expression is used recursively.  This can happen
+when executing a pattern takes a long time and when checking for messages on
+channels a callback is invoked that also uses a pattern or an autocommand is
+triggered.  In most cases this should be fine, but if a pattern is in use when
+it's used again it fails.  Usually this means there is something wrong with
+the pattern.
+
 ==============================================================================
 2. The definition of a pattern		*search-pattern* *pattern* *[pattern]*
 					*regular-expression* *regexp* *Pattern*