fix: always print heading and at least a fallback message

[boredland]

closes #6

[github-actions]

♻️ Forge Gas Snapshots

Path	Value
mocks/someOther.json
full amount; receiver: ->enableCollateral	↓1% (-1000) 143,837

🔕 Unchanged

Path	Value
mocks/some.json
full amount; receiver: ->enableCollateral	154,838
full amount; sender: ->disableCollateral;	93,274
full amount; sender: ->disableCollateral; receiver: dirty, ->enableCollateral	133,059
full amount; sender: collateralDisabled	103,095
partial amount; sender: collateralDisabled;	103,095
partial amount; sender: collateralDisabled; receiver: ->enableCollateral	144,837
partial amount; sender: collateralEnabled;	123
partial amount; sender: collateralEnabled; receiver: ->enableCollateral	145,045
mocks/someOther.json
full amount; sender: ->disableCollateral;	103,274
full amount; sender: ->disableCollateral; receiver: ->enableCollateral	145,016
full amount; sender: ->disableCollateral; receiver: dirty, ->enableCollateral	133,059
full amount; sender: collateralDisabled	103,095
partial amount; sender: collateralDisabled;	103,095
partial amount; sender: collateralDisabled; receiver: ->enableCollateral	144,837
partial amount; sender: collateralEnabled;	103,303
partial amount; sender: collateralEnabled; receiver: ->enableCollateral	145,045