From e77c04fe6e044cc77c9f00fe68b00da8241f11f3 Mon Sep 17 00:00:00 2001
From: AmarnathCJD <amarnathcharichilil@gmail.com>
Date: Sun, 11 Aug 2024 13:53:59 +0530
Subject: [PATCH] trim trailing spaces if followed by a new line.

---
 telegram/formatting.go | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/telegram/formatting.go b/telegram/formatting.go
index bde34944..6b8b422d 100755
--- a/telegram/formatting.go
+++ b/telegram/formatting.go
@@ -127,13 +127,22 @@ func parseHTMLToTags(htmlStr string) (string, []Tag, error) {
 	return cleanedText, tagOffsets, nil
 }
 
+func trimTrailing(input string) string {
+	lastNewlineIndex := strings.LastIndex(input, "\n")
+	if lastNewlineIndex != -1 && strings.TrimSpace(input[lastNewlineIndex:]) == "" {
+		return input[:lastNewlineIndex]
+	}
+
+	return input
+}
+
 // getTextLength returns the length of the text content of a node, including its children
 func getTextLength(n *html.Node) int32 {
 	var tagLength int32 = 0
 	currentNode := n.FirstChild
 	for currentNode != nil {
 		if currentNode.Type == html.TextNode {
-			tagLength += utf16RuneCountInString(strings.TrimSpace(currentNode.Data))
+			tagLength += utf16RuneCountInString(trimTrailing(currentNode.Data))
 		} else if currentNode.Type == html.ElementNode {
 			tagLength += getTextLength(currentNode)
 		}