format (GoDoc) comments with Go 1.19 to prepare for go updates

Older versions of Go do not format these comments, so we can already
reformat them ahead of time to prevent gofmt linting failing once
we update to Go 1.19 or up.

Result of:

    gofmt -s -w $(find . -type f -name '*.go' | grep -v "/vendor/")

With some manual adjusting.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli-plugins/manager/plugin.go

@@ -34,7 +34,7 @@ type Plugin struct {
 // returned with no error. An error is only returned due to a
 // non-recoverable error.
 //
-// nolint: gocyclo
+//nolint:gocyclo
 func newPlugin(c Candidate, rootcmd *cobra.Command) (Plugin, error) {
 	path := c.Path()
 	if path == "" {