xerrors: copy files from errors to new package

Also copy
errors/fmt/errors_test.go -> fmt_test.go
errors/fmt/errors.go -> adaptor.go
errors/fmt/errors.go -> fmt.go

Change-Id: I9c5b99076ed806d4f1ab06f8fc125d33ce7f4116
Reviewed-on: https://go-review.googlesource.com/c/158758
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
13 files changed
tree: 77a969f3949aa600539cb6fc08eb913177bb1c18
  1. .gitattributes
  2. .gitignore
  3. AUTHORS
  4. CONTRIBUTING.md
  5. CONTRIBUTORS
  6. LICENSE
  7. PATENTS
  8. README.md
  9. apidiff/
  10. cmd/
  11. codereview.cfg
  12. ebnf/
  13. ebnflint/
  14. errors/
  15. fsnotify/
  16. inotify/
  17. io/
  18. mmap/
  19. old/
  20. rand/
  21. shiny/
  22. shootout/
  23. utf8string/
  24. winfsnotify/
  25. xerrors/
README.md

exp

This subrepository holds experimental and deprecated (in the old directory) packages.

The idea for this subrepository originated as the pkg/exp directory of the main repository, but its presence there made it unavailable to users of the binary downloads of the Go installation. The subrepository has therefore been created to make it possible to go get these packages.

Warning: Packages here are experimental and unreliable. Some may one day be promoted to the main repository or other subrepository, or they may be modified arbitrarily or even disappear altogether.

In short, code in this subrepository is not subject to the Go 1 compatibility promise. (No subrepo is, but the promise is even more likely to be violated by go.exp than the others.)

Caveat emptor.