fix(--gas-report): add back signatures, even if empty, avoid nesting multiple selectors

[zerosnacks]

Motivation

Per feedback: #9216 (comment)

I had originally not included the empty signature as it differs from the regular --gas-report Markdown output

Solution

Looks as follows after passing through | jq:

It does not render pretty formatted in the terminal by itself

[
  {
    "contract": "src/Contracts.sol:ContractOne",
    "deployment": {
      "gas": 103375,
      "size": 255
    },
    "functions": {
      "foo()": {
        "calls": 1,
        "min": 45387,
        "mean": 45387,
        "median": 45387,
        "max": 45387
      }
    }
  },
  {
    "contract": "src/Contracts.sol:ContractThree",
    "deployment": {
      "gas": 103591,
      "size": 256
    },
    "functions": {
      "baz()": {
        "calls": 1,
        "min": 260712,
        "mean": 260712,
        "median": 260712,
        "max": 260712
      }
    }
  },
  {
    "contract": "src/Contracts.sol:ContractTwo",
    "deployment": {
      "gas": 103375,
      "size": 255
    },
    "functions": {
      "bar()": {
        "calls": 1,
        "min": 64984,
        "mean": 64984,
        "median": 64984,
        "max": 64984
      }
    }
  }
]

[
  {
    "contract": "src/Counter.sol:Counter",
    "deployment": {
      "gas": 101137,
      "size": 250
    },
    "functions": {
      "a()": {
        "calls": 1,
        "min": 2261,
        "mean": 2261,
        "median": 2261,
        "max": 2261
      },
      "b()": {
        "calls": 1,
        "min": 2305,
        "mean": 2305,
        "median": 2305,
        "max": 2305
      },
      "setNumber(int256)": {
        "calls": 2,
        "min": 23648,
        "mean": 33604,
        "median": 33604,
        "max": 43560
      },
      "setNumber(uint256)": {
        "calls": 2,
        "min": 23604,
        "mean": 33560,
        "median": 33560,
        "max": 43516
      }
    }
  }
]

[zerosnacks]

Hi @sakulstra, addressed your feedback in #9216 (comment)

Please have a look if this format is in line with your request

[sakulstra]

@zerosnacks thanks that seems perfect to me 👍

[DaniPopes]

lgtm