When a developer finds a failing build (example commit, example build), they currently read the following:
00:00:53.914 /src/modules/ext.eventLogging/core.js 00:00:53.914 [2m117:error Identifier 'client_dt' is not in camel case [2mcamel 00:00:53.914 [2m366:error Identifier 'client_dt' is not in camel case [2mcamel
The colors are still recognised and activated, but there are also garbage escape sequences printed out, which is rather confusing to users. In particular because it makes it difficult to tell what is what. E.g. 117 above is a linr number, and camel is the eslint rule ID, which would need to be used to disable the rule inside the patch.
This is a regression, but it may've been weeks or months by now. Sorry for not noticing it earlier.