From [1]: > The most contentious point of the original design was the special-case handling of a trailing ": %v", ": %s", and ": %w" in the format string, whic

From [1]: > The most contentious point of the original design was the special-case handling of a trailing ": %v", ": %s", and ": %w" in the format string, which did not follow the usual printf model in which the meaning of % verbs is context-independent and all non-% text has no meaning at all. We will remove those special cases from Go 1.13. At least, they removed the really ugly special cases! [1] https://github.com/golang/go/issues/29934#issuecomment-489682919 https://github.com/golang/go/issues/29934#issuecomment-48968...