Failing tex2lyx test

[Kornel Benko]

Lately, the test "tex2lyx/roundtrip/CJK.tex" fails.
Bisecting and searching for the wrong looking diff led to
***
0f4c9027056a6f4f771382e9ebfc7940274bf5c0 is the first bad commit
commit 0f4c9027056a6f4f771382e9ebfc7940274bf5c0
Author: Juergen Spitzmueller <sp...@lyx.org>
Date:   Sat Mar 10 14:58:55 2018 +0100

    tex2lyx: make nested CJK parsing slightly less dumb.
    
    Fixes: #9562

:040000 040000 4cc422bc2f78eddf376ee4d52a4fab54c2b2a397 
a3e56ae7deca45e8959bc1df11530937878816d2 M      src
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The problematic diff looks like:
****************************************
--- /usr2/src/lyx/lyx-git/src/tex2lyx/test/CJK.lyx.lyx  Sun Mar 11 19:35:25 
2018
+++ /BUILD/BUILDMint18/BuildLyxGitQt5.6.1local-gcc5.4.0/src/tex2lyx/test/
CJK.lyx        Mon Mar 12 16:03:37 2018
@@ -130,7 +130,27 @@
 \end_inset

  Japanese
- (this CJK environment will be put in ERT because LyX supports only one CJK
+ (this
+\begin_inset ERT
+status collapsed
+
+\begin_layout Plain Layout
+C
+\end_layout
+
+\end_inset
+
+JK environment will be put in ERT because LyX supports only one
+\begin_inset ERT
+status collapsed
+
+\begin_layout Plain Layout
+C
+\end_layout
+
+\end_inset
+
+JK
  font mapping per document, this environment uses the
 \begin_inset ERT
 status collapsed
***************************************************

        Kornel

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