interrogate: rename `operator [] =` to `operator []=`

dtool/src/interrogate/interfaceMakerPythonNative.cxx

@@ -74,7 +74,7 @@ RenameSet methodRenameDictionary[] = {
   { "operator ="    , "assign",                 0 },
   { "operator ()"   , "__call__",               0 },
   { "operator []"   , "__getitem__",            0 },
-  { "operator [] =" , "__setitem__",            0 },
+  { "operator []="  , "__setitem__",            0 },
   { "operator ++unary", "increment",            0 },
   { "operator ++"   , "increment",              0 },
   { "operator --unary", "decrement",            0 },

dtool/src/interrogate/interrogateBuilder.cxx

@@ -3054,7 +3054,7 @@ define_method(CPPInstance *function, InterrogateType &itype,
         CPPFunctionType *ftype = new CPPFunctionType(void_type, params, 0);
 
         // Now make up an instance for the function.
-        CPPInstance *function = new CPPInstance(ftype, "operator [] =");
+        CPPInstance *function = new CPPInstance(ftype, "operator []=");
         function->_ident->_native_scope = scope;
 
         FunctionIndex index = get_function(function, "",