patch 8.2.3295: 'cursorline' should not apply to 'breakindent'

Problem:    'cursorline' should not apply to 'breakindent'.
Solution:   Make 'cursorline' apply to 'breakindent' and 'showbreak'
            consistently. (closes #8684)
diff --git a/src/testdir/test_diffmode.vim b/src/testdir/test_diffmode.vim
index 4a54f8c..5400de6 100644
--- a/src/testdir/test_diffmode.vim
+++ b/src/testdir/test_diffmode.vim
@@ -1018,6 +1018,37 @@
   call delete('Xtest_diff_cursorline')
 endfunc
 
+func Test_diff_with_cursorline_breakindent()
+  CheckScreendump
+
+  call writefile([
+	\ 'hi CursorLine ctermbg=red ctermfg=white',
+	\ 'set noequalalways wrap diffopt=followwrap cursorline breakindent',
+	\ '50vnew',
+	\ 'call setline(1, ["  ","  ","  ","  "])',
+	\ 'exe "norm 20Afoo\<Esc>j20Afoo\<Esc>j20Afoo\<Esc>j20Abar\<Esc>"',
+	\ 'vnew',
+	\ 'call setline(1, ["  ","  ","  ","  "])',
+	\ 'exe "norm 20Abee\<Esc>j20Afoo\<Esc>j20Afoo\<Esc>j20Abaz\<Esc>"',
+	\ 'windo diffthis',
+	\ '2wincmd w',
+	\ ], 'Xtest_diff_cursorline_breakindent')
+  let buf = RunVimInTerminal('-S Xtest_diff_cursorline_breakindent', {})
+
+  call term_sendkeys(buf, "gg0")
+  call VerifyScreenDump(buf, 'Test_diff_with_cul_bri_01', {})
+  call term_sendkeys(buf, "j")
+  call VerifyScreenDump(buf, 'Test_diff_with_cul_bri_02', {})
+  call term_sendkeys(buf, "j")
+  call VerifyScreenDump(buf, 'Test_diff_with_cul_bri_03', {})
+  call term_sendkeys(buf, "j")
+  call VerifyScreenDump(buf, 'Test_diff_with_cul_bri_04', {})
+
+  " clean up
+  call StopVimInTerminal(buf)
+  call delete('Xtest_diff_cursorline_breakindent')
+endfunc
+
 func Test_diff_with_syntax()
   CheckScreendump