Fix line break in ddev exec help, fixes ddev#4634 (ddev#4636)

Author: miromichalicka

cmd/ddev/cmd/exec.go

@@ -20,7 +20,8 @@ var DdevExecCmd = &cobra.Command{
 	Short:   "Execute a shell command in the container for a service. Uses the web service by default.",
 	Long:    `Execute a shell command in the container for a service. Uses the web service by default. To run your command in the container for another service, run "ddev exec --service <service> <cmd>". If you want to use raw, uninterpreted command inside container use --raw as in example.`,
 	Example: `ddev exec ls /var/www/html
-ddev exec --service db\nddev exec -s db
+ddev exec --service db
+ddev exec -s db
 ddev exec -s solr (assuming an add-on service named 'solr')
 ddev exec --raw -- ls -lR`,
 	Run: func(cmd *cobra.Command, args []string) {