From 51ac42c62f8b1bd0c1669c01fa445cb1ed76d02e Mon Sep 17 00:00:00 2001
From: Shulhan <ms@kilabit.info>
Date: Mon, 6 Jan 2025 23:32:02 +0700
Subject: file_markup: convert extension to lowercase on markupKind only

Converting extension to lowercase before trimming it may not remove
the extension itself since the string has changes.
---
 file_markup.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/file_markup.go b/file_markup.go
index 95785bb..87fb5ac 100644
--- a/file_markup.go
+++ b/file_markup.go
@@ -41,7 +41,7 @@ func NewFileMarkup(filePath string, fi os.FileInfo) (fmarkup *FileMarkup, err er
 		}
 	}
 
-	var ext = strings.ToLower(filepath.Ext(filePath))
+	var ext = filepath.Ext(filePath)
 	var basePath = strings.TrimSuffix(filePath, ext)
 
 	fmarkup = &FileMarkup{
@@ -55,7 +55,7 @@ func NewFileMarkup(filePath string, fi os.FileInfo) (fmarkup *FileMarkup, err er
 }
 
 func markupKind(ext string) int {
-	switch ext {
+	switch strings.ToLower(ext) {
 	case extAsciidoc:
 		return markupKindAdoc
 	case extMarkdown:
-- 
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