From 8e256fbf0fb1fdffafe5bb35e18a0746d3ce8d1f Mon Sep 17 00:00:00 2001
From: Kornel Benko <kornel@lyx.org>
Date: Wed, 11 May 2022 17:42:50 +0200
Subject: [PATCH] FindAdv: Do not insert space for '\n' if there already are
 spaces around

---
 src/lyxfind.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/lyxfind.cpp b/src/lyxfind.cpp
index 7048fc2824..8c609a7980 100644
--- a/src/lyxfind.cpp
+++ b/src/lyxfind.cpp
@@ -3962,10 +3962,11 @@ string MatchStringAdv::normalize(docstring const & s, bool ignore_format) const
 	while ((pos = t.find("\n")) != string::npos) {
 		if (pos > 1 && t[pos-1] == '\\' && t[pos-2] == '\\' ) {
 			// Handle '\\\n'
-			if (isAlnumASCII(t[pos+1])) {
+			if (isPrintableNonspace(t[pos+1]) && ((pos < 3) || isPrintableNonspace(t[pos-3]))) {
 				t.replace(pos-2, 3, " ");
 			}
 			else {
+				// Already a space there
 				t.replace(pos-2, 3, "");
 			}
 		}