fix(render/default): remove unnecessary spaces when the icon is empty (#301)

Author: 110y

lua/notify/render/default.lua

@@ -2,7 +2,7 @@ local api = vim.api
 local base = require("notify.render.base")
 
 return function(bufnr, notif, highlights, config)
-  local left_icon = notif.icon .. " "
+  local left_icon = notif.icon == "" and "" or notif.icon .. " "
   local max_message_width = math.max(math.max(unpack(vim.tbl_map(function(line)
     return vim.fn.strchars(line)
   end, notif.message))))
@@ -16,12 +16,11 @@ return function(bufnr, notif, highlights, config)
 
   local namespace = base.namespace()
   api.nvim_buf_set_lines(bufnr, 0, 1, false, { "", "" })
+
+  local virt_text = left_icon == "" and {} or { { " " }, { left_icon, highlights.icon } }
+  table.insert(virt_text, { left_title .. left_buffer, highlights.title })
   api.nvim_buf_set_extmark(bufnr, namespace, 0, 0, {
-    virt_text = {
-      { " " },
-      { left_icon, highlights.icon },
-      { left_title .. left_buffer, highlights.title },
-    },
+    virt_text = virt_text,
     virt_text_win_col = 0,
     priority = 10,
   })