[LyX/master] Amend [f2029fb3/lyxgit]

[Enrico Forestieri]

commit 17abf68bac2859ce2d2e82a813daec2b20ef4467
Author: Enrico Forestieri <for...@lyx.org>
Date:   Wed Apr 17 18:08:46 2019 +0200

    Amend [f2029fb3/lyxgit]
    
    The fix for #11552 was reintroducing #9348. This commit makes sure
    it stays fixed.
---
 src/mathed/MathParser.cpp |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/src/mathed/MathParser.cpp b/src/mathed/MathParser.cpp
index f0d1d7c..65ef723 100644
--- a/src/mathed/MathParser.cpp
+++ b/src/mathed/MathParser.cpp
@@ -946,7 +946,11 @@ bool Parser::parse1(InsetMathGrid & grid, unsigned flags,
                        parse(ar, FLAG_BRACE_LAST, mode);
                        // do not create a BraceInset if they were written by 
LyX
                        // this helps to keep the annoyance of  "a choose b"  
to a minimum
-                       if (ar.size() == 1 && (ar[0]->extraBraces() || 
ar[0]->asBraceInset()))
+                       // But create a BraceInset if a script follows (#9348)
+                       InsetMathBrace const * mb = ar[0]->asBraceInset();
+                       if (ar.size() == 1 && (ar[0]->extraBraces()
+                                              || (mb && mb->cell(0).size()
+                                                  && 
!mb->cell(0)[0].nucleus()->asScriptInset())))
                                cell->append(ar);
                        else
                                cell->push_back(MathAtom(new 
InsetMathBrace(ar)));