fix #32121, macro hygiene bug in named tuples

(cherry picked from commit d8798be)

src/macroexpand.scm

@@ -414,6 +414,14 @@
                    (body (cadr e))
                    (m (caddr e)))
               (resolve-expansion-vars-with-new-env body env m parent-scope inarg #t)))
+           ((tuple)
+            (cons (car e)
+                  (map (lambda (x)
+                         (if (assignment? x)
+                             `(= ,(unescape (cadr x))
+                                 ,(resolve-expansion-vars-with-new-env x env m parent-scope inarg))
+                             (resolve-expansion-vars-with-new-env x env m parent-scope inarg)))
+                       (cdr e))))
 
            ;; todo: trycatch
            (else

test/syntax.jl

@@ -1741,6 +1741,9 @@ end
            end
        end)), :thunk)
 
+# issue #32121
+@test @id28992((a=1, b=2)) === (a=1, b=2)
+
 # issue #30030
 let x = 0
     @test (a=1, b=2, c=(x=3)) == (a=1, b=2, c=3)