confused error message for struct initialize

[HerrCai0907]

Parser cannot understand incorrect usage between = and : when initializing struct.

The second error message in example miss the possibility of :.

[4021] Error: The value identifier current is unbound.
   │
 8 │   let engine : SfcEngine = { seed, init_circle, current=0 }
   │                                                 ───┬───  
   │                                                    ╰───── The value identifier current is unbound.
───╯
[3002] Error: Parse error, unexpected token `=`, you may expect `,` or `}`.
   │
 8 │   let engine : SfcEngine = { seed, init_circle, current=0 }
   │                                                        ┬  
   │                                                        ╰── Parse error, unexpected token `=`, you may expect `,` or `}`.
───╯
error: failed when building

[Yoorkin]

Thanks for your feedback, we will improve the error message for this case.

[Yoorkin]

fixed