fix: handle rendering empty buffers

## Details

Issue: #597

Since we entirely skip rendering empty buffers if a buffer is cleared it
can cause extmarks to be left behind and not cleaned up.

Skipping empty buffers was added to fix how LSP hover buffers were
created, where they were initially empty, then later content was added.
However due to this order the debounce would skip rendering the latter.

To fix all of these interactions we now simply do not debounce when
rendering an empty buffer. As a result any decorations left should now
be properly cleaned up and content being added later should not get
skipped via the debounce.

Author: MeanderingProgrammer

CHANGELOG.md

@@ -13,6 +13,15 @@
   [996ec12](https://github.com/MeanderingProgrammer/render-markdown.nvim/commit/996ec12e1164e56401babf236c56cb2d9321d923)
 - support math superscript characters and body transformer for footnotes [48934b4](https://github.com/MeanderingProgrammer/render-markdown.nvim/commit/48934b49a2363b49ae1d698ed4cb30fb79d7efe8)
 
+### Bug Fixes
+
+- separate twitter and x link icons [#604](https://github.com/MeanderingProgrammer/render-markdown.nvim/pull/604)
+  [b3efd64](https://github.com/MeanderingProgrammer/render-markdown.nvim/commit/b3efd6408e4e4d66d6caaee0579e72b579bc0884)
+
+### Collaborator Shoutouts
+
+- @calebdw
+
 ## 8.11.0 (2026-01-07)
 
 ### Features

doc/render-markdown.txt

@@ -1,4 +1,4 @@
-*render-markdown.txt*      For NVIM v0.11.6      Last change: 2026 February 03
+*render-markdown.txt*      For NVIM v0.11.6      Last change: 2026 February 22
 
 ==============================================================================
 Table of Contents                          *render-markdown-table-of-contents*

lua/render-markdown/core/ui.lua

@@ -71,11 +71,8 @@ function Updater:start()
     if not env.valid(self.buf, self.win) then
         return
     end
-    if env.buf.empty(self.buf) then
-        return
-    end
     self.decorator:schedule(
-        self:changed(),
+        self:changed() and not env.buf.empty(self.buf),
         self.config.debounce,
         log.runtime('update', function()
             self:run()

lua/render-markdown/health.lua

@@ -6,7 +6,7 @@ local state = require('render-markdown.state')
 local M = {}
 
 ---@private
-M.version = '8.11.7'
+M.version = '8.11.8'
 
 function M.check()
     M.start('versions')