Fix duplicate const in generated code wrapping templates

Fix duplicate const in generated code when template instantiation type is const
and use of template parameter is also explicitly const, such as:

  template <typename T> struct Conster {
    void cccc1(T const& t) {}
  };
  %template(ConsterInt) Conster<const int>;

Above previously led to generated code:
  (arg1)->cccc1((int const const &)*arg2);
instead of
  (arg1)->cccc1((int const &)*arg2);

1 files changed, 14 insertions, 0 deletions

diff --git a/CHANGES.current b/CHANGES.current
index f0b916be0..ea3e81022 100644
--- a/CHANGES.current
+++ b/CHANGES.current
@@ -7,6 +7,20 @@ the issue number to the end of the URL: https://github.com/swig/swig/issues/
 Version 4.2.0 (in progress)
 ===========================
 
+2023-03-08: wsfulton
+            Fix duplicate const in generated code when template instantiation type is const
+            and use of template parameter is also explicitly const, such as:
+
+              template <typename T> struct Conster {
+                void cccc1(T const& t) {}
+              };
+              %template(ConsterInt) Conster<const int>;
+
+            Above previously led to generated code:
+              (arg1)->cccc1((int const const &)*arg2);
+            instead of
+              (arg1)->cccc1((int const &)*arg2);
+
 2023-03-01: wsfulton
             Partial template specialization fixes to support default arguments from the primary
             template's parameter list.