patch 9.1.0039: too vague errors for 'listchars'/'fillchars'

Problem:  too vague errors for 'listchars'/'fillchars'
Solution: Include the field name in error message.
          (zeertzjq)

related: neovim/neovim#27050
closes: #13877

Co-authored-by: Cole Frankenhoff <cole.nhf@gmail.com>
Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 4dff6b5..b3f0494 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt*	For Vim version 9.1.  Last change: 2024 Jan 03
+*options.txt*	For Vim version 9.1.  Last change: 2024 Jan 17
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -3478,12 +3478,10 @@
 						*'fillchars'* *'fcs'*
 'fillchars' 'fcs'	string	(default "vert:|,fold:-,eob:~")
 			global or local to window |global-local|
-			{not available when compiled without the |+folding|
-			feature}
 	Characters to fill the statuslines, vertical separators and special
 	lines in the window.
 	It is a comma-separated list of items.  Each item has a name, a colon
-	and the value of that item:
+	and the value of that item: |E1511|
 
 	  item name	default		Used for ~
 	  stl		' '		statusline of the current window
@@ -3504,7 +3502,7 @@
 <
 	For the "stl", "stlnc", "foldopen", "foldclose" and "foldsep" items
 	single-byte and multibyte characters are supported.  But double-width
-	characters are not supported.
+	characters are not supported. |E1512|
 
 	The highlighting used for these items:
 	  item name	highlight group ~
@@ -5243,7 +5241,7 @@
 'listchars' 'lcs'	string	(default "eol:$")
 			global or local to window |global-local|
 	Strings to use in 'list' mode and for the |:list| command.  It is a
-	comma-separated list of string settings.
+	comma-separated list of string settings. *E1511*
 							*lcs-eol*
 	  eol:c		Character to show at the end of each line.  When
 			omitted, there is no extra character at the end of the
@@ -5319,7 +5317,7 @@
 
 	The characters ':' and ',' should not be used.  UTF-8 characters can
 	be used when 'encoding' is "utf-8", otherwise only printable
-	characters are allowed.  All characters must be single width.
+	characters are allowed.  All characters must be single width. *E1512*
 
 	Each character can be specified as hex: >
 		set listchars=eol:\\x24