first map key of view output is not wrapped by quote

[yipu3]

Describe the bug
I wrote a contract, which had a view function to return a HashMap. But the first map key of the output is not wrapped by single quote(the rest are wrapped), which is not consistent and will cause inconvenience.

To Reproduce
Steps to reproduce the behavior:

1. Use testnet: export NODE_ENV="testnet"
2. Call my contract in testnet: near view fund.abliukrny.testnet get_receiver_to_fund

Expected behavior
The first map key of the output should also be wrapped by single quote.

Screenshots

Desktop (please complete the following information):

• OS: MacOS Monterey
• Version 12.5.1

Additional context