From a5bc38b8c16be93bac900137a5837585006cc8a4 Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Wed, 1 Aug 2018 18:03:02 +0200
Subject: [PATCH] patch 8.1.0231: :help -? goes to help for -+

Problem:    :help -? goes to help for -+.
Solution:   Add -? to list of special cases. (Hirohito Higashi)
---
 src/ex_cmds.c                     | 4 ++--
 src/testdir/test_help_tagjump.vim | 5 +++++
 src/version.c                     | 2 ++
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index a30178b64..37331519a 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -6583,7 +6583,7 @@ find_help_tags(
     static char *(mtable[]) = {"*", "g*", "[*", "]*", ":*",
 			       "/*", "/\\*", "\"*", "**",
 			       "cpo-*", "/\\(\\)", "/\\%(\\)",
-			       "?", ":?", "?<CR>", "g?", "g?g?", "g??",
+			       "?", ":?", "-?", "?<CR>", "g?", "g?g?", "g??",
 			       "/\\?", "/\\z(\\)", "\\=", ":s\\=",
 			       "[count]", "[quotex]",
 			       "[range]", ":[range]",
@@ -6593,7 +6593,7 @@ find_help_tags(
     static char *(rtable[]) = {"star", "gstar", "[star", "]star", ":star",
 			       "/star", "/\\\\star", "quotestar", "starstar",
 			       "cpo-star", "/\\\\(\\\\)", "/\\\\%(\\\\)",
-			       "?", ":?", "?<CR>", "g?", "g?g?", "g??",
+			       "?", ":?", "-?", "?<CR>", "g?", "g?g?", "g??",
 			       "/\\\\?", "/\\\\z(\\\\)", "\\\\=", ":s\\\\=",
 			       "\\[count]", "\\[quotex]",
 			       "\\[range]", ":\\[range]",
diff --git a/src/testdir/test_help_tagjump.vim b/src/testdir/test_help_tagjump.vim
index 51b006c57..00a96b227 100644
--- a/src/testdir/test_help_tagjump.vim
+++ b/src/testdir/test_help_tagjump.vim
@@ -26,6 +26,11 @@ func Test_help_tagjump()
   call assert_true(getline('.') =~ '\*:?\*')
   helpclose
 
+  help -?
+  call assert_equal("help", &filetype)
+  call assert_true(getline('.') =~ '\*-?\*')
+  helpclose
+
   help FileW*Post
   call assert_equal("help", &filetype)
   call assert_true(getline('.') =~ '\*FileWritePost\*')
diff --git a/src/version.c b/src/version.c
index e0af0206f..b826410db 100644
--- a/src/version.c
+++ b/src/version.c
@@ -794,6 +794,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    231,
 /**/
     230,
 /**/