[LyX/master] Pass a docstring parameter by address

[Jean-Marc Lasgouttes]

commit 13b05102f2d9dcecd9d0fe24e49000867c5b835a
Author: Jean-Marc Lasgouttes <lasgout...@lyx.org>
Date:   Wed Sep 11 17:30:33 2024 +0200

    Pass a docstring parameter by address
    
    Spotted by Coverity scan.
---
 src/insets/InsetCommandParams.cpp | 2 +-
 src/insets/InsetCommandParams.h   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/insets/InsetCommandParams.cpp 
b/src/insets/InsetCommandParams.cpp
index a0d02e2245..6701c20d5f 100644
--- a/src/insets/InsetCommandParams.cpp
+++ b/src/insets/InsetCommandParams.cpp
@@ -99,7 +99,7 @@ static ParamInfo const & findInfo(InsetCode code, string 
const & cmdName)
 
 ParamInfo::ParamData::ParamData(std::string const & s, ParamType t,
                                 ParamHandling h, bool ignore,
-                                docstring default_value)
+                                docstring const & default_value)
        : name_(s), type_(t), handling_(h), ignore_(ignore),
          default_value_(default_value)
 {}
diff --git a/src/insets/InsetCommandParams.h b/src/insets/InsetCommandParams.h
index 5f463454c0..2faaf3f545 100644
--- a/src/insets/InsetCommandParams.h
+++ b/src/insets/InsetCommandParams.h
@@ -55,7 +55,7 @@ public:
                ///
                ParamData(std::string const &, ParamType, ParamHandling = 
HANDLING_NONE,
                          bool ignore = false,
-                         docstring default_value = docstring());
+                         docstring const & default_value = docstring());
                ///
                std::string name() const { return name_; }
                ///
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