[LyX/master] Fix a typo in a comment

[Thibaut Cuvelier]

commit 4aeba17895cac6fa2e563f315eb7292eb508271f
Author: Thibaut Cuvelier <tcuvelier at lyx.org>
Date:   Wed Dec 28 02:32:05 2022 +0100

    Fix a typo in a comment
---
 src/tex2lyx/dummy_impl.cpp |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/tex2lyx/dummy_impl.cpp b/src/tex2lyx/dummy_impl.cpp
index 62436af..30eb847 100644
--- a/src/tex2lyx/dummy_impl.cpp
+++ b/src/tex2lyx/dummy_impl.cpp
@@ -10,7 +10,7 @@
 
 /**
  * This file contains dummy implementation of some methods that are
- * needed byclasses used by tex2lyx. This allows to reduce the number
+ * needed by classes used by tex2lyx. This allows to reduce the number
  * of classes we have to link against.
 */