vim-patch:9.1.0864: message history is fixed to 200 (#31215)

Problem:  message history is fixed to 200
Solution: Add the 'msghistory' option, increase the default
          value to 500 (Shougo Matsushita)

closes: vim/vim#16048

4bd9b2b246

Co-authored-by: Shougo Matsushita <Shougo.Matsu@gmail.com>
Co-authored-by: Milly <milly.ca@gmail.com>

runtime/doc/news.txt

@@ -228,6 +228,7 @@ LUA
 OPTIONS
 
 • 'completeopt' flag "fuzzy" enables |fuzzy-matching| during |ins-completion|.
+• 'msghistory' controls maximum number of messages to remember.
 • 'tabclose' controls which tab page to focus when closing a tab page.
 
 PERFORMANCE

runtime/doc/options.txt

@@ -3197,7 +3197,8 @@ A jump table for the options with a short description can be found at |Q_op|.
 			global
 	A history of ":" commands, and a history of previous search patterns
 	is remembered.  This option decides how many entries may be stored in
-	each of these histories (see |cmdline-editing|).
+	each of these histories (see |cmdline-editing| and 'msghistory' for
+	the number of messages to remember).
 	The maximum value is 10000.
 
 				*'hlsearch'* *'hls'* *'nohlsearch'* *'nohls'*
@@ -4289,6 +4290,12 @@ A jump table for the options with a short description can be found at |Q_op|.
 	Defines the maximum time in msec between two mouse clicks for the
 	second click to be recognized as a multi click.
 
+						*'msghistory'* *'mhi'*
+'msghistory' 'mhi'	number	(default 500)
+			global
+	Determines how many entries are remembered in the |:messages| history.
+	The maximum value is 10000.
+
 						*'nrformats'* *'nf'*
 'nrformats' 'nf'	string	(default "bin,hex")
 			local to buffer

runtime/lua/vim/_meta/options.lua

@@ -3016,7 +3016,8 @@ vim.go.hid = vim.go.hidden
 
 --- A history of ":" commands, and a history of previous search patterns
 --- is remembered.  This option decides how many entries may be stored in
---- each of these histories (see `cmdline-editing`).
+--- each of these histories (see `cmdline-editing` and 'msghistory' for
+--- the number of messages to remember).
 --- The maximum value is 10000.
 ---
 --- @type integer
@@ -4378,6 +4379,15 @@ vim.o.mouset = vim.o.mousetime
 vim.go.mousetime = vim.o.mousetime
 vim.go.mouset = vim.go.mousetime
 
+--- Determines how many entries are remembered in the `:messages` history.
+--- The maximum value is 10000.
+---
+--- @type integer
+vim.o.msghistory = 500
+vim.o.mhi = vim.o.msghistory
+vim.go.msghistory = vim.o.msghistory
+vim.go.mhi = vim.go.msghistory
+
 --- This defines what bases Vim will consider for numbers when using the
 --- CTRL-A and CTRL-X commands for adding to and subtracting from a number
 --- respectively; see `CTRL-A` for more info on these commands.

runtime/optwin.vim

@@ -626,6 +626,8 @@ call <SID>AddOption("terse", gettext("add 's' flag in 'shortmess' (don't show se
 call <SID>BinOptionG("terse", &terse)
 call <SID>AddOption("shortmess", gettext("list of flags to make messages shorter"))
 call <SID>OptionG("shm", &shm)
+call <SID>AddOption("msghistory", gettext("how many messages are remembered"))
+call append("$", " \tset mhi=" . &mhi)
 call <SID>AddOption("showcmd", gettext("show (partial) command keys in location given by 'showcmdloc'"))
 let &sc = s:old_sc
 call <SID>BinOptionG("sc", &sc)