cli/command: fix formatting of comments, and minor linting issues

Comments should have a leading space unless the comment is
for special purposes (go:generate, nolint:)

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

cli/command/service/update.go

@@ -1036,7 +1036,7 @@ portLoop:
 			if _, ok := portSet[portConfigToString(&port)]; ok {
 				continue
 			}
-			//portSet[portConfigToString(&port)] = port
+			// portSet[portConfigToString(&port)] = port
 			newPorts = append(newPorts, port)
 		}
 	}