testing: use "exit code" in documentation consistently

The documentation for m.Run says it returns an "exit code" to pass to
os.Exit. The argument to os.Exit is named "code".

While "exit code", "exit status" and "exit status code" are all valid ways
to refer to the same concept, prefer to stick to one form for consistency
and to avoid confusing users.

Change-Id: If76ee3fab5cc99c79e05ac1a4e413790a9c93d60
GitHub-Last-Rev: 85a081d2f03c2cf9e8e519916986c59c86aebf57
GitHub-Pull-Request: golang/go#37899
Reviewed-on: https://go-review.googlesource.com/c/go/+/223778
Reviewed-by: Gabriel Aszalos <gabriel.aszalos@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Gabriel Aszalos <gabriel.aszalos@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
1 file changed
tree: 1db4bfb0e619e5f1889c0f2863e50b94c8516c72
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. CONTRIBUTING.md
  12. CONTRIBUTORS
  13. favicon.ico
  14. LICENSE
  15. PATENTS
  16. README.md
  17. robots.txt
  18. SECURITY.md
README.md

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