From c3c1ac0621c4986720f022ecaa4c2e7badce6f96 Mon Sep 17 00:00:00 2001
From: Richard Heck <rgheck@lyx.org>
Date: Fri, 24 Apr 2015 12:49:26 -0400
Subject: [PATCH] Don't write \PassThruChars if it is empty.

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

diff --git a/src/Layout.cpp b/src/Layout.cpp
index be51756328..1e89433777 100644
--- a/src/Layout.cpp
+++ b/src/Layout.cpp
@@ -1286,7 +1286,8 @@ void Layout::write(ostream & os) const
 		os << "\tLabelCounter \"" << to_utf8(counter) << "\"\n";
 	os << "\tFreeSpacing " << free_spacing << '\n';
 	os << "\tPassThru " << pass_thru << '\n';
-	os << "\tPassThruChars " << to_utf8(pass_thru_chars) << '\n';
+	if (!pass_thru_chars.empty())
+		os << "\tPassThruChars " << to_utf8(pass_thru_chars) << '\n';
 	os << "\tParbreakIsNewline " << parbreak_is_newline << '\n';
 	switch (spacing.getSpace()) {
 	case Spacing::Double: