`os/exec.Cmd.CombineOutput` runs the command, hence, it cannot be used
after calling the `Run` method.
Because `CombineOutput` already runs the command, we can use it directly
instead of `Run`.
Without this change if the command returns an non-zero code we get an
error because of the command already started and we don't get the
output.
Example removing a copyright notice from one file and running the linter
(only showing the affected printed line)
Without this fix
2022/05/26 15:48:40 [/storj check-copyright] error exec: already started
With this fix
2022/05/26 16:22:40 [/storj check-copyright] error missing copyright certificate/doc.go: %!w(<nil>)
NOTE the `%!w(<nil)` is a bug in the check-copyright linter.
Change-Id: I40b64842028399b92a8982bfb143e1f87f92467b
Our linting process depends heavily on custom tools and linting
configuration. To help improve this process for running on local
developer machines, we can run the various tasks in our existing CI
container.
Change-Id: I60407686ce9233cc4f16e3724c5e8d44367aa200
