defaults: sidescroll=1

ref #6289

runtime/doc/options.txt

@@ -5445,14 +5445,13 @@ A jump table for the options with a short description can be found at |Q_op|.
 	See |tab-page| for more information about tab pages.
 
 						*'sidescroll'* *'ss'*
-'sidescroll' 'ss'	number	(default 0)
+'sidescroll' 'ss'	number	(default 1)
 			global
 	The minimal number of columns to scroll horizontally.  Used only when
 	the 'wrap' option is off and the cursor is moved off of the screen.
 	When it is zero the cursor will be put in the middle of the screen.
-	When using a slow terminal set it to a large number or 0.  When using
-	a fast terminal use a small number or 1.  Not used for "zh" and "zl"
-	commands.
+	When using a slow terminal set it to a large number or 0.  Not used
+	for "zh" and "zl" commands.
 
 						*'sidescrolloff'* *'siso'*
 'sidescrolloff' 'siso'	number (default 0)

runtime/doc/term.txt

@@ -232,11 +232,6 @@ correct values. See |:mode|.
 Slow and fast terminals				*slow-fast-terminal*
 						*slow-terminal*
 
-If you have a fast terminal you may like to set the 'ruler' option.  The
-cursor position is shown in the status line.  If you are using horizontal
-scrolling ('wrap' option off) consider setting 'sidescroll' to a small
-number.
-
 If you have a slow terminal you may want to reset the 'showcmd' and 'ruler'
 options.  The command characters and cursor positions will not be shown in the
 status line (which involves a lot of cursor motions and attribute changes for

runtime/doc/vim_diff.txt

@@ -48,6 +48,7 @@ a complete and centralized reference of those differences.
 - 'ruler' is set by default
 - 'sessionoptions' doesn't include "options"
 - 'showcmd' is set by default
+- 'sidescroll' defaults to 1
 - 'smarttab' is set by default
 - 'tabpagemax' defaults to 50
 - 'tags' defaults to "./tags;,tags"

src/nvim/options.lua

@@ -2185,7 +2185,7 @@ return {
       type='number', scope={'global'},
       vi_def=true,
       varname='p_ss',
-      defaults={if_true={vi=0}}
+      defaults={if_true={vi=1}}
     },
     {
       full_name='sidescrolloff', abbreviation='siso',

src/nvim/testdir/setup.vim

@@ -3,6 +3,7 @@
 set noruler
 set noshowcmd
 set belloff=
+set sidescroll=0
 
 " Make sure 'runtimepath' and 'packpath' does not include $HOME.
 set rtp=$VIM/vimfiles,$VIMRUNTIME,$VIM/vimfiles/after

test/functional/ui/highlight_spec.lua

@@ -905,6 +905,7 @@ describe("'winhighlight' highlight", function()
   end)
 
   it('background applies also to non-text', function()
+    command('set sidescroll=0')
     insert('Lorem ipsum dolor sit amet ')
     command('set shiftwidth=2')
     feed('>>')

test/functional/ui/mouse_spec.lua

@@ -3,6 +3,7 @@ local Screen = require('test.functional.ui.screen')
 local clear, feed, meths = helpers.clear, helpers.feed, helpers.meths
 local insert, feed_command = helpers.insert, helpers.feed_command
 local eq, funcs = helpers.eq, helpers.funcs
+local command = helpers.command
 
 describe('ui/mouse/input', function()
   local screen
@@ -706,6 +707,7 @@ describe('ui/mouse/input', function()
   end)
 
   it('horizontal scrolling', function()
+    command('set sidescroll=0')
     feed("<esc>:set nowrap<cr>")
 
     feed("a <esc>20Ab<esc>")