chore: fix formatting and update changelog

Author: MeanderingProgrammer

CHANGELOG.md

@@ -16,6 +16,12 @@
 
 - ignore empty output from latex converter [#535](https://github.com/MeanderingProgrammer/render-markdown.nvim/issues/535)
   [2064980](https://github.com/MeanderingProgrammer/render-markdown.nvim/commit/2064980580af7f00385859b6344c6a4737383257)
+- use nil if bg is missing in bg_as_fg [bfd67f1](https://github.com/MeanderingProgrammer/render-markdown.nvim/commit/bfd67f1402b97ac619cb538f4bbaed12a7fa89aa)
+- ctermbg heading borders being all white [#546](https://github.com/MeanderingProgrammer/render-markdown.nvim/pull/546)
+
+### Collaborator Shoutouts
+
+- @bew
 
 ## 8.9.0 (2025-10-06)
 

doc/render-markdown.txt

@@ -1,4 +1,4 @@
-*render-markdown.txt*       For NVIM v0.11.4      Last change: 2025 October 24
+*render-markdown.txt*       For NVIM v0.11.4      Last change: 2025 October 28
 
 ==============================================================================
 Table of Contents                          *render-markdown-table-of-contents*

lua/render-markdown/core/colors.lua

@@ -128,8 +128,8 @@ function M.bg_as_fg(highlight, force)
             ctermfg = hl.ctermbg,
         })
         M.cache.bg_as_fg[name] = {
-          hl = highlight,
-          visible = hl.bg ~= nil or hl.ctermbg ~= nil,
+            hl = highlight,
+            visible = hl.bg ~= nil or hl.ctermbg ~= nil,
         }
     end
     return M.cache.bg_as_fg[name].visible and name or nil

lua/render-markdown/health.lua

@@ -6,7 +6,7 @@ local state = require('render-markdown.state')
 local M = {}
 
 ---@private
-M.version = '8.9.10'
+M.version = '8.9.11'
 
 function M.check()
     M.start('versions')