From b3c9077a5be76cd88b9a0c07b6d6c072d5c8ac3e Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Fri, 6 May 2022 16:32:46 +0100
Subject: patch 8.2.4891: Vim help presentation could be better

Problem:    Vim help presentation could be better.
Solution:   Add an imported file for extra Vim help support.  Show highlight
            names in the color they have.
---
 Filelist                        |  1 +
 runtime/import/dist/vimhelp.vim | 21 +++++++++++++++++++++
 src/version.c                   |  2 ++
 3 files changed, 24 insertions(+)
 create mode 100644 runtime/import/dist/vimhelp.vim

diff --git a/Filelist b/Filelist
index bc44866d64..af5fcc5a37 100644
--- a/Filelist
+++ b/Filelist
@@ -722,6 +722,7 @@ RT_ALL =	\
 		runtime/doc/xxd.1 \
 		runtime/ftoff.vim \
 		runtime/gvimrc_example.vim \
+		runtime/import/dist/vimhelp.vim \
 		runtime/macros/README.txt \
 		runtime/macros/editexisting.vim \
 		runtime/macros/hanoi/click.me \
diff --git a/runtime/import/dist/vimhelp.vim b/runtime/import/dist/vimhelp.vim
new file mode 100644
index 0000000000..1f587251b9
--- /dev/null
+++ b/runtime/import/dist/vimhelp.vim
@@ -0,0 +1,21 @@
+vim9script
+
+# Extra functionality for displaying Vim help .
+
+# Called when editing the doc/syntax.txt file
+export def HighlightGroups()
+  var buf: number = bufnr('%')
+  var lnum: number = search('\*highlight-groups\*', 'cn')
+  while getline(lnum) !~ '===' && lnum < line('$')
+    var word: string = getline(lnum)->matchstr('^\w\+\ze\t')
+    if word->hlexists()
+      prop_type_add('help-hl-' .. word, {
+	bufnr: buf,
+	highlight: word,
+	combine: false,
+	})
+      prop_add(lnum, 1, {length: word->strlen(), type: 'help-hl-' .. word})
+    endif
+    ++lnum
+  endwhile
+enddef
diff --git a/src/version.c b/src/version.c
index d5b33337a7..57dec85572 100644
--- a/src/version.c
+++ b/src/version.c
@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4891,
 /**/
     4890,
 /**/
-- 
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