feat(indentscope): show indent guide on wrapped lines

Resolve #635.

lua/mini/indentscope.lua

@@ -938,6 +938,8 @@ H.make_draw_function = function(indicator, opts)
     virt_text_pos = 'overlay',
   }
 
+  if vim.fn.has('nvim-0.10') == 1 then extmark_opts.virt_text_repeat_linebreak = true end
+
   local current_event_id = opts.event_id
 
   return function(l)

tests/screenshots/tests-test_indentscope.lua---draw()---shows-symbols-on-wrapped-lines

@@ -0,0 +1,33 @@
+--|---------|--
+01|aa          
+02| aa         
+03| ╎aa        
+04| ╎ aa       
+05| ╎ aa       
+06| ╎ aaaaaaaaa
+07| ╎ aaa      
+08| ╎aa        
+09| aa         
+10|aa          
+11|~           
+12|~           
+13|~           
+14|< [+] 6,2   
+15|            
+
+--|---------|--
+01|000000000000
+02|000000000000
+03|010000000000
+04|010000000000
+05|010000000000
+06|010000000000
+07|010000000000
+08|010000000000
+09|000000000000
+10|000000000000
+11|222222222222
+12|222222222222
+13|222222222222
+14|333333333333
+15|444444444444

tests/test_indentscope.lua

@@ -509,6 +509,21 @@ T['draw()']['does not round time of every animation step'] = function()
   child.expect_screenshot()
 end
 
+T['draw()']['shows symbols on wrapped lines'] = function()
+  -- Add a long line of text. Set 'breakindent' and 'breakindentopt' to ensure
+  -- the wrapped line has the same indent as the current line
+  set_cursor(6, 1)
+  child.cmd('normal! 10Aa')
+  child.wo.breakindentopt = 'min:0'
+  child.wo.breakindent = true
+
+  -- Move the cursor back to the original position
+  set_cursor(6, 1)
+  child.lua('MiniIndentscope.config.draw.animation = function() return 0 end')
+  child.lua('MiniIndentscope.draw()')
+  child.expect_screenshot()
+end
+
 T['undraw()'] = new_set({
   hooks = {
     pre_case = function()