Unresolved placeholders in error log message

During the execution of my Azure Function, the script host is logging the following:
Executed '{FullName}' (Failed, Id={InvocationId})

FullName and InvocationId are not being resolved. I assume there is a $ sign missing in the C# code, similar to the bug in line 75 of this corresponding unit test:
https://www.csharpcodi.com/vs2/486/azure-webjobs-sdk/test/Microsoft.Azure.WebJobs.Host.UnitTests/Loggers/LoggerExtensionsTests.cs/

#### Investigative information

Please provide the following:

- Function App version (1.0 or 2.0-beta): 1.0

Start with the referenced LoggerExtensionsTests.cs unit test, especially the line 75 comparison, and trace the code that formats the Azure Functions execution log message. Confirm the test covers the reported Function App 1.0 output, then ensure the completed message resolves FullName and InvocationId instead of leaving placeholders.

Written by the indexing model from the issue text.