Wix4 errors in MSBuild messages aren't 0-padded

[barnson]

• Which version of WiX are you building with?

Tools@HEAD

• Which version of Visual Studio are you building with (if any)?

n/a

• Which version of the WiX Toolset Visual Studio Extension are you building with (if any)?

n/a

• Which version of .NET are you building with?

4.7.2

• If the problem occurs when installing your packages built with WiX, what is the version of Windows the package is running on?

n/a

• Describe the problem and the steps to reproduce it.

Errors are reported like this: error WIX2:.

• Describe the behavior you expected and how it differed from the actual behavior.

Errors are reported like this: error WIX0002:.