* Fix a bug where strings with special characters are not quoted
Before:
```
...
services:
<service>:
....
logging:
options:
tag: {{.ImageName}}|{{.Name}}|{{.ImageFullID}}|{{.FullID}}
max-file: 3
...
```
and docker-compose up fails
after:
```
...
services:
<service>:
....
logging:
options:
tag: "{{.ImageName}}|{{.Name}}|{{.ImageFullID}}|{{.FullID}}"
max-file: "3"
...
```
and docker-compose up works
* Remove no longer necessary workarounds
