new shorthand syntax for simple_passthrough if assigning to same name simple_passthrough(i=i, j=j : j = j:) becomes simple_passthrough(i,j : j :)

tests/test_c_passthrough.expected_results

@@ -1,3 +1,4 @@
 same_file: 5
 diff_file: 7
 diff_file: 13
+diff_file: 1337

tests/test_c_passthrough.krak

@@ -19,6 +19,14 @@ fun main(): int {
         j = i + j;
     """
     c_passthrough_diff::print_it(j)
+
+    // test new shorthand for same name assignments
+    var r: int = 1000;
+    var s: int = 337;
+    __if_comp__ __C__ simple_passthrough(r, s : s:) """
+        s = r + s;
+    """
+    c_passthrough_diff::print_it(s)
     return 0
 }