docs: fix typo

README.md

@@ -165,18 +165,18 @@ require("statuscol").setup({
   segments = {
     {
       text = {
-        " ",               -- whitespace padding
-        function(args)     -- custom line number highlight function
+        " ",                -- whitespace padding
+        function(args)      -- custom line number highlight function
           return ((args.lnum % 2 > 0) and "%#DiffDelete#%=" or "%#DiffAdd#%=").."%l"
         end,
-        " ",               -- whitespace padding
+        " ",                -- whitespace padding
       },
       condition = {
-        true,              -- always shown
-        function(args)     -- shown only for the current window
+        true,               -- always shown
+        function(args)      -- shown only for the current window
           return vim.api.nvim_get_current_win() == args.win
         end,
-        builtin.notempty,  -- only shown when the rest of the statuscolumn is not empty
+        builtin.not_empty,  -- only shown when the rest of the statuscolumn is not empty
       },
     }
   }

lua/statuscol.lua

@@ -162,7 +162,7 @@ local function place_signs(win, signs)
       if not lines[lnum] then lines[lnum] = f.foldclosed(lnum) end
       if lines[lnum] > 0 then
         lnum = lines[lnum]
-        for j = lnum, f.foldclosedend(lnum) do lines[j] = lnum end
+        for j = lnum + 1, f.foldclosedend(lnum) do lines[j] = lnum end
       end
     end